The roles and mechanism of cocatalysts in photocatalytic water splitting to produce hydrogen
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Nan Xiao, Songsong Li, Xuli Li, Lei Ge, Yangqin Gao, Ning LiAbstractPhotocatalytic hydrogen (H2) evolution via water spilling over semiconductors has been considered to be one of the most promising strategies for sustainable energy supply in the future to provide non-pollution and renewable energy. The key to efficient conversion of solar-chemical energy is the design of an efficient structure for high charge separation and transportation. Therefore, cocatalysts are necessary in boosting photocatalytic H2 evolution. To date, semi...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Catalytic upgrading of ethanol to butanol over a binary catalytic system of FeNiOx and LiOH
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Jifeng Pang, Mingyuan Zheng, Zhinuo Wang, Shimin Liu, Xinsheng Li, Xianquan Li, Junhu Wang, Tao ZhangAbstractCatalytic conversion of ethanol to butanol is vital to bridge the gap between huge amounts of ethanol production, the limited blending ratio of ethanol in gasoline, and the outstanding performance of butanol. In this work, a highly active binary catalytic system of FeNiOx and LiOH was developed for upgrading of ethanol to butanol. After 24 h reaction at 493 K, the selectivity to butanol reached 71% with>90% high carbon alc...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Insight into catalytic properties of Co3O4-CeO2 binary oxides for propane total oxidation
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Wenjun Zhu, Xiao Chen, Jianhui Jin, Xin Di, Changhai Liang, Zhongmin LiuAbstractA series of Co3O4-CeO2 binary oxides with various Co/(Ce+Co) molar ratios were synthesized using a citric acid method, and their catalytic properties toward the total oxidation of propane were examined. The activities of the catalysts decrease in the order CoCeOx-70> CoCeOx-90> Co3O4> CoCeOx-50> CoCeOx-20> CeO2. CoCeOx-70 (Co/(Ce+Co) = 70% molar ratio) exhibits the highest catalytic activity toward the total oxidation of propane, of which the T90 is 3...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Rambutan-like CoP@Mo-Co-O hollow microspheres for efficient hydrogen evolution reaction in alkaline solution
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Wen Zhou, Mingmei Wu, Gaoren LiAbstractWater electrolysis has attracted a lot of attention in recent years for hydrogen production. CoP has been widely investigated as a traditional electrocatalyst for hydrogen evolution reaction (HER). However, the strong bond strength of P–H bond and weak chemical stability are still the key problems in affecting catalytic performance of CoP. In this work, we synthesized rambutan-like CoP@Mo-Co-O hollow microspheres as HER electrocatalyst, solving the two problems of CoP as electrocatalyst. B...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Fabrication of a solid superacid with temperature-regulated silica-isolated biochar nanosheets
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Zengtian Chen, Yuxue Xiao, Chao Zhang, Zaihui Fu, Ting Huang, Qingfeng Li, Yuanxiong Yao, Shutao Xu, Xiaoli Pan, Wenhao Luo, Changzhi LiAbstractThis paper reports a new strategy for the structural reconstruction of biomass carbon sulfonic acid (BCSA) to its solid superacid counterpart. In this approach, a cheap layered biomass carbon (BC) source is chemically exfoliated by cetyltrimethyl ammonium bromide and then converted to silica-isolated carbon nanosheets (CNSs) by a series of conversion steps. The state of the silica-isolate...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
SrTiO3/BiOI heterostructure: Interfacial charge separation, enhanced photocatalytic activity, and reaction mechanism
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Ruimin Chen, Hong Wang, Huizhong Wu, Jianping Sheng, Jieyuan Li, Wen Cui, Fan DongAbstractHeterostructured photocatalysts provide an effective way to achieve enhanced photocatalytic performances through efficient charge separation. Although both wide- and narrow-band-gap photocatalysts have been widely investigated, the charge separation and transfer mechanism at the contacting interface of the two has not been fully revealed. Here, a novel SrTiO3/BiOI (STB) heterostructured photocatalyst was successfully fabricated by using a fa...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Effect of pH on the catalytic performance of PtSn/B-ZrO2 in propane dehydrogenation
Publication date: April 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 4Author(s): Zhonghai Ji, Dengyun Miao, Lijun Gao, Xiulian Pan, Xinhe BaoAbstractBoron-modified ZrO2 (B-ZrO2) was synthesized under various pH values (9, 10, and 11) and used as the supports of PtSn catalysts (PtSn/B-ZrO2-x) for non-oxidative dehydrogenation of propane. The NH3-TPD and pyridine IR show that only Lewis acid is present and the acid strength increases with the synthesis pH. PtSn/B-ZrO2-10 exhibits the best catalytic performance with an initial propane conversion of 36% and a deactivation rate constant (kd) of 0.0127 h−1. The X...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Preface to Special Column on Electrocatalysis
Publication date: May 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 5Author(s): Zidong Wei, Minhua ShaoGraphical Abstract (Source: Chinese Journal of Catalysis)
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Recent progress on oxygen and hydrogen peroxide reduction reactions on Pt single crystal electrodes
Publication date: May 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 5Author(s): Valentín Briega-Martos, Enrique Herrero, Juan M. FeliuGraphical AbstractThe most recent advances for the ORR in Pt single crystal electrodes are summarized. A mechanism for the reaction is presented in light of the recent results. (Source: Chinese Journal of Catalysis)
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Pt alloy oxygen-reduction electrocatalysts: Synthesis, structure, and property
Publication date: May 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 5Author(s): Xiao Xia Wang, Joshua Sokolowski, Hui Liu, Gang WuProton exchange membrane fuel cells (PEMFCs) are considered a promising power source for electric vehicles and stationary residential applications. However, current PEMFCs have several problems that require solutions, including high cost, insufficient power density, and limited performance durability. A kinetically sluggish oxygen reduction reaction (ORR) is primarily responsible for these issues. The development of advanced Pt-based catalysts is crucial for solving these problems i...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Electrochemical hydrogen compression and purification versus competing technologies: Part I. Pros and cons
Publication date: May 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 5Author(s): Maha Rhandi, Marine Trégaro, Florence Druart, Jonathan Deseure, Marian ChatenetAbstractIt is undisputed that hydrogen will play a great role in our future energetic mix, because it enables the storage of renewable electricity (power-to-H2) and the reversible conversion into electricity in fuel cell, not to speak of its wide use in the (petro)chemical industry. Whereas in these applications, pure hydrogen is required, today's hydrogen production is still largely based on fossil fuels and can therefore not be considered pure. Theref...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Electrochemical hydrogen compression and purification versus competing technologies: Part II. Challenges in electrocatalysis
Publication date: May 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 5Author(s): Marine Trégaro, Maha Rhandi, Florence Druart, Jonathan Deseure, Marian ChatenetHydrogen will be at the basis of the World’s energy policy in forthcoming decades, owing to its decarbonized nature, at least when produced from renewables. For now, hydrogen is still essentially produced from fossil feedstock (and to a minor extent from biomass); in consequence the present hydrogen gas on the market is containing non-negligible amounts of impurities that prevent its immediate usage in specialty chemistry or as an energy carrier in fu...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Supported dual-atom catalysts: Preparation, characterization, and potential applications
Publication date: May 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 5Author(s): Jing Zhang, Qiu-an Huang, Juan Wang, Jing Wang, Jiujun Zhang, Yufeng ZhaoDeveloping sustainable and clean electrochemical energy conversion technologies is a crucial step in addressing the challenges of energy shortage and environmental pollution. Exploring and developing new electrocatalysts with excellent performance and low cost will facilitate the commercial use of these energy conversion technologies. Recently, dual-atom catalysts (DACs) have attracted considerable research interest since they exhibit higher metal atom loading...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
ZnCl2 salt facilitated preparation of FeNC: Enhancing the content of active species and their exposure for highly-efficient oxygen reduction reaction
Publication date: May 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 5Author(s): Zhan Xin Mao, Min Jie Wang, Lu Liu, Lishan Peng, Siguo Chen, Li Li, Jing Li, Zidong WeiIntroducing catalytically-active Fe and N into carbon materials results in promising FeNC catalysts for oxygen reduction reaction. However, the doped Fe and N species are frequently subject to heavy loss in a traditional carbonization process owing to Fe agglomeration and evaporation of N-contained small molecules. Besides, pyrolysis may make materials sintering which embeds a large number of active sites in the bulk phase and impedes direct expo...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Interatomic diffusion in Pd-Pt core-shell nanoparticles
Publication date: May 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 5Author(s): Yanfeng Zhang, Shangqian Zhu, Lili Zhang, Dong Su, Minhua ShaoAbstractPt monolayer-based core-shell catalysts have garnered significant interest for the application of low temperature fuel cell technology as their use may enable a decreased loading of Pt while still providing sufficient current density to meet volumetric requirements. One promising candidate in this class of materials is a Pd@Pt core-shell catalyst, which shows enhanced activity toward oxygen reduction reaction (ORR). One concern with the use of Pd@Pt, however, is ...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
