Surface elemental distribution effect of Pt-Pb hexagonal nanoplates for electrocatalytic methanol oxidation reaction
Publication date: May 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 5Author(s): Hee Jin Kim, Yong-Deok Ahn, Jeonghyeon Kim, Kyoung-Su Kim, Yeon Uk Jeong, Jong Wook Hong, Sang-Il ChoiAbstractBimetallic Pt-based catalysts have been extensively investigated to enhance the performance of direct methanol fuel cells (DMFCs) because CO, a by-product, reduces the activity of the pure Pt catalysts. Herein, we synthesized Pt-Pb hexagonal nanoplates as a model catalyst for the methanol oxidation reaction (MOR) and further controlled the Pt and Pb distributions on the surface of the nanoplates through acetic acid (HAc) tr...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Investigation on the coordination mechanism of Pt-containing species and qualification of the alkaline content during Pt/C preparation via a solvothermal polyol method
Publication date: May 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 5Author(s): Rongrong Zeng, Kun Wang, Wei Shao, Junhang Lai, Shuqin Song, Yi WangAbstractA solvothermal assisted ethylene glycol reduction method is a common technology for Pt/C catalysts preparation. Here, the coordination mechanism of the Pt-containing species is deeply studied by innovatively adopting the ultraviolet-visible spectroscopy technology and H+ concentration detector. Moreover, the amount of NaOH that effectively coordinates Pt4+ has been tentatively qualified and the heating parameters during the preparation process of Pt/C have ...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Nitrogen and sulfur dual-doped high-surface-area hollow carbon nanospheres for efficient CO2 reduction
Publication date: May 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 5Author(s): Guodong Li, Yongjie Qin, Yu Wu, Lei Pei, Qi Hu, Hengpan Yang, Qianling Zhang, Jianhong Liu, Chuanxin HeAbstractThe electrochemical reduction of CO2 (CO2RR) can substantially contribute to the production of useful chemicals and reduction of global CO2 emissions. Herein, we presented N and S dual-doped high-surface-area carbon materials (SZ-HCN) as CO2RR catalysts. N and S were doped by one-step pyrolysis of a N-containing polymer and S powder. ZnCl2 was applied as a volatile porogen to prepare porous SZ-HCN. SZ-HCN with a high speci...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Robust MOF-253-derived N-doped carbon confinement of Pt single nanocrystal electrocatalysts for oxygen evolution reaction
Publication date: May 2020Source: Chinese Journal of Catalysis, Volume 41, Issue 5Author(s): Hellen Gabriela Rivera Monestel, Ibrahim Saana Amiinu, Andrés Alvarado González, Zonghua Pu, BibiMaryam Mousavi, Shichun MuAbstractAlthough carbon-supported platinum (Pt/C) is still considered the most active electrocatalyst for hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR), its applications in metal-air batteries as a cathode catalyst, or for oxygen generation via water splitting electrolysis as an anode catalyst is mainly constrained by the insufficient kinetic activity and stability in the oxygen evolut...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
Tuning the oxygen evolution electrocatalysis on NiFe-layered double hydroxides via sulfur doping
We report a facile way to prepare sulfur (S) doped Ni4/5Fe1/5-layered double hydroxide (LDH) electrocatalysts for oxygen evolution reaction (OER). The influence of S doping amount on the OER activity of the resulted NiFe-LDHs was studied and the optimal surface S content was ca. 0.43 at%. The developed S-doped NiFe-LDH exhibits excellent OER catalyst activity in 1.0 M KOH with overpotential of only 257 mV at the current density of 10 mA cm-2. Moreover, the catalyst could maintain high activity after 30 h stability test. The high activity of the S-doped NiFe-LDH catalysts may originate from the synergistic effect between S ...
Source: Chinese Journal of Catalysis - January 26, 2020 Category: Chemistry Source Type: research
