scholarly journals High performance platinum single atom electrocatalyst for oxygen reduction reaction

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Jing Liu ◽  
Menggai Jiao ◽  
Lanlu Lu ◽  
Heather M. Barkholtz ◽  
Yuping Li ◽  
...  

Abstract For the large-scale sustainable implementation of polymer electrolyte membrane fuel cells in vehicles, high-performance electrocatalysts with low platinum consumption are desirable for use as cathode material during the oxygen reduction reaction in fuel cells. Here we report a carbon black-supported cost-effective, efficient and durable platinum single-atom electrocatalyst with carbon monoxide/methanol tolerance for the cathodic oxygen reduction reaction. The acidic single-cell with such a catalyst as cathode delivers high performance, with power density up to 680 mW cm−2 at 80 °C with a low platinum loading of 0.09 mgPt cm−2, corresponding to a platinum utilization of 0.13 gPt kW−1 in the fuel cell. Good fuel cell durability is also observed. Theoretical calculations reveal that the main effective sites on such platinum single-atom electrocatalysts are single-pyridinic-nitrogen-atom-anchored single-platinum-atom centres, which are tolerant to carbon monoxide/methanol, but highly active for the oxygen reduction reaction.

NANO ◽  
2020 ◽  
Vol 15 (09) ◽  
pp. 2050115
Author(s):  
Zixu Wu ◽  
Guangxing Li ◽  
Qin Liao ◽  
Ruida Ding ◽  
Xuze Zuo ◽  
...  

Enhancing the catalytic activity of manganese oxide in oxygen reduction reaction (ORR) is a key issue for its large-scale application in metal-air fuel cells. Ag-doped [Formula: see text]-MnO2 nanowires without Ag or Ag2O have been successfully synthesized via a facile hydrothermal method, and the changes in both the structure and electrochemical catalytic performances after Ag doping are investigated. Compared with the pristine [Formula: see text]-MnO2, the as-prepared Ag-doped MnO2 exhibits a significantly enhanced catalytic activity in both ORR and Mg-air fuel cell application. With Ag/Mn ratio of 1:25, Ag-doped MnO2 exhibits a typical 4e-reaction pathway and presents a 163 mV higher half-wave potential than that of the pristine [Formula: see text]-MnO2. Furthermore, it demonstrates a power density of 75.1[Formula: see text]mW[Formula: see text]cm[Formula: see text] at current density of 134.5[Formula: see text]mA[Formula: see text]cm[Formula: see text] in the Mg-air fuel cells. The enhanced ORR performances are considered to be contributed from the activation of surface lattice oxygen, the improvement in conductivity and the increase in oxygen vacancies of [Formula: see text]-MnO2. These findings provide new understanding for developing high-performance manganese oxide catalysts.


2020 ◽  
Vol 44 (6) ◽  
pp. 4851-4860 ◽  
Author(s):  
Xiaopeng Han ◽  
Ying Huang ◽  
Xiaogang Gao ◽  
Ming Zhao ◽  
Qiao Gao

2020 ◽  
Vol 132 (19) ◽  
pp. 7341-7341
Author(s):  
Chun‐Chao Hou ◽  
Lianli Zou ◽  
Liming Sun ◽  
Kexin Zhang ◽  
Zheng Liu ◽  
...  

2016 ◽  
Vol 75 (14) ◽  
pp. 1035-1040 ◽  
Author(s):  
I. L. Alonso-Lemus ◽  
B. Escobar-Morales ◽  
F. J. Rodriguez-Varela ◽  
D. Gonzalez-Quijano ◽  
D. Lardizabal ◽  
...  

ChemSusChem ◽  
2016 ◽  
Vol 9 (15) ◽  
pp. 1986-1995 ◽  
Author(s):  
David Sebastián ◽  
Alexey Serov ◽  
Kateryna Artyushkova ◽  
Jonathan Gordon ◽  
Plamen Atanassov ◽  
...  

2019 ◽  
Vol 7 (45) ◽  
pp. 26062-26070 ◽  
Author(s):  
Qiong Peng ◽  
Jian Zhou ◽  
Jiatian Chen ◽  
Tian Zhang ◽  
Zhimei Sun

MXene supported single-atom catalysts catalyze the oxygen reduction reaction in a proton exchange membrane fuel cell.


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