TY - JOUR
AU - Tingting Zhai
AU - Hao Wang
AU - Sarah R Beaudoin
AU - Ran Zhang
AU - Minkyoung Kwak
AU - Shujin Hou
AU - Zhengxiao Guo
AU - Shannon W Boettcher
AB - <p>Anion-exchange-membrane water electrolyzers (AEMWEs) are a possible low-capital-expense, efficient, and scalable hydrogen-production technology with inexpensive hardware, earth-abundant catalysts, and pure water. However, pure-water-fed AEMWEs remain at an early stage of development and suffer from inferior performance compared with proton-exchange-membrane water electrolyzers (PEMWEs). One challenge is to develop effective non-platinum-group-metal (non-PGM) anode catalysts and electrodes in pure-water-fed AEMWEs. We show how LaNiO<sub>3</sub>-based perovskite oxides can be tuned by cosubstitution on both A- and B-sites to simultaneously maintain high metallic electrical conductivity along with a degree of surface reconstruction to expose a stable Co-based active catalyst. The optimized perovskite, Sr<sub>0.1</sub>La<sub>0.9</sub>Co<sub>0.5</sub>Ni<sub>0.5</sub>O<sub>3</sub>, yielded pure-water AEMWEs operating at 1.97 V at 2.0 A cm<sup>–2</sup> at 70 °C with a pure-water feed, thus illustrating the utility of the catalyst design principles.</p><p>&nbsp;</p>
BT - Journal of the American Chemical Society
DA - 07/05/2025
DO - 10.1021/jacs.5c01621
IS - 18
N2 - <p>Anion-exchange-membrane water electrolyzers (AEMWEs) are a possible low-capital-expense, efficient, and scalable hydrogen-production technology with inexpensive hardware, earth-abundant catalysts, and pure water. However, pure-water-fed AEMWEs remain at an early stage of development and suffer from inferior performance compared with proton-exchange-membrane water electrolyzers (PEMWEs). One challenge is to develop effective non-platinum-group-metal (non-PGM) anode catalysts and electrodes in pure-water-fed AEMWEs. We show how LaNiO<sub>3</sub>-based perovskite oxides can be tuned by cosubstitution on both A- and B-sites to simultaneously maintain high metallic electrical conductivity along with a degree of surface reconstruction to expose a stable Co-based active catalyst. The optimized perovskite, Sr<sub>0.1</sub>La<sub>0.9</sub>Co<sub>0.5</sub>Ni<sub>0.5</sub>O<sub>3</sub>, yielded pure-water AEMWEs operating at 1.97 V at 2.0 A cm<sup>–2</sup> at 70 °C with a pure-water feed, thus illustrating the utility of the catalyst design principles.</p><p>&nbsp;</p>
PB - American Chemical Society (ACS)
PY - 2025
SP - 15448
EP - 15458
T2 - Journal of the American Chemical Society
TI - Perovskite Catalysts for Pure-Water-Fed Anion-Exchange-Membrane Electrolyzer Anodes: Co-design of Electrically Conductive Nanoparticle Cores and Active Surfaces
UR - https://doi.org/10.1021/jacs.5c01621
VL - 147
SN - 0002-7863, 1520-5126
ER -