Ultra‐Low Loading Pseudo‐Single‐Crystal Mesoporous PtPd Catalysts for High‐Performance Hydrogen Gas Batteries
Abstract
ABSTRACT Rechargeable hydrogen gas batteries show a great promise for large‐scale energy storage due to their high safety, environmental friendliness, high efficiency and long‐cycle life. However, the costly catalysts at the anode for hydrogen oxidation/evolution reactions (HOR/HER) hinder the practicability. Here, we report a pseudo‐single‐crystal mesoporous (PSCM) PtPd catalyst with high HOR/HER bifunctional activities for high‐performance hydrogen gas batteries. It exhibits an outstanding HOR activity with a kinetic current density of 3.10 A mg −1 and an HER overpotential of 34.8 mV at 10 mA cm −2 , outperforming commercial Pt/C (0.42 A mg −1 , 79.3 mV). When assembling Ni‐H 2 battery with a low PSCM‐PtPd catalyst loading of ∼45 µg cm −2 , it displays a high energy efficiency of ∼85% and cycling stability of >1000 cycles. Even at an ultra‐low catalyst loading of ∼10 µg cm −2 , the Ni‐H 2 (PSCM‐PtPd) battery still exhibits an energy density of ~135 Wh kg −1 and durability of >1000 cycles with a cell cost of ~105 $ kWh −1 , much better than that of Pt/C‐based battery (>700 $ kWh −1 ). We demonstrate that the superior activity of the PSCM‐PtPd catalyst originates from the charge transfer from Pd to Pt and lattice distortion caused by Pd incorporation, and the enhanced stability is attributed to its fewer grain boundaries and stable attachment to the electrode. This work offers a promising pathway toward designing cost‐effective and scalable energy storage systems.
Article Details
Authors (19)
Guili Zhao
Department of Applied Chemistry School of Chemistry and Materials Science Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 P. R. China
Hongxu Liu
Department of Chemistry
Chuye Pan
Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui P. R. China
Xiang Chu
State Key Laboratory of Rare Earth Resource Utilization
Taoli Jiang
Department of Applied Chemistry, School of Chemistry and Materials Science, Hefei National Research Center for Physical Sciences at the Microscale
Yidi Wang
Shunxin Tan
Department of Applied Chemistry School of Chemistry and Materials Science Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China Hefei Anhui 230026 China
Zhonglin Li
Lidong Sun
Yirui Ma
Department of Applied Chemistry School of Chemistry and Materials Science Hefei National Research Center for Physical Sciences at the Microscale
Jingwen Xu
Department of Applied Chemistry, School of Chemistry and Materials Science, Hefei National Research Center for Physical Sciences at the Microscale
Dongyang Shen
Department of Applied Chemistry School of Chemistry and Materials Science Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China Hefei Anhui 230026 China
Touqeer Ahmad
Department of Applied Chemistry School of Chemistry and Materials Science Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui China
Nawab Ali Khan
Department of Applied Chemistry School of Chemistry and Materials Science Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui China
Yue Lin
Husam N. Alshareef
Center for Renewable Energy and Storage Technologies (CREST), Division of Physical Sciences and Engineering
Xiangyang Li
Jinlong Yang
State Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM)
Wei Chen