Shen Di, Sun Fanfei, Liang Zhijian, Mei Bingbao, Xie Ying, Wang Yucheng, Wang Lei, Fu Honggang
Key Laboratory of Functional Inorganic Materials Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, China.
Shanghai Institute of Applied Physics, Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China.
Nat Commun. 2025 Apr 24;16(1):3883. doi: 10.1038/s41467-025-58735-0.
Reducing Pt loading in the anodic hydrogen oxidation reaction (HOR) and concurrently increasing mass activity and CO tolerance are essential for advancing proton exchange membrane fuel cells (PEMFCs). Here, an electrocatalyst of 1.7 wt% Pt clusters loaded on a hollow bowl-like WO/WC heterostructure is designed to increase the anti-CO-poisoning HOR. Due to its unique electron delocalization effect, the WO/WC heterostructure serves as a warehouse to share electrons with Pt; this simultaneously lowers the HOR barrier and accumulates the hydroxyl radicals (•OH) to accelerate CO oxidation. The Pt‒O bond originating from the oxygen spillover effect of WO promotes hydrogen and CO oxidation, whereas the lattice‒O consumed in WO replenished through water dissociation. The resultant electrocatalyst exhibits mass activity of 469 A g at 50 mV and anti-toxicity even at 2000 ppm CO. The PEMEC delivers a peak power density of 1.63 W cm and maintains considerable anti-CO poisoning performance.
降低阳极氢氧化反应（HOR）中的铂负载量，同时提高质量活性和抗一氧化碳耐受性，对于推进质子交换膜燃料电池（PEMFC）至关重要。在此，设计了一种负载在中空碗状WO/WC异质结构上的1.7 wt%铂簇的电催化剂，以增强抗一氧化碳中毒的氢氧化反应。由于其独特的电子离域效应，WO/WC异质结构充当与铂共享电子的仓库；这同时降低了氢氧化反应的势垒并积累羟基自由基（•OH）以加速一氧化碳氧化。源自WO氧溢流效应的Pt‒O键促进氢气和一氧化碳氧化，而WO中消耗的晶格氧通过水离解得到补充。所得的电催化剂在50 mV时表现出469 A g的质量活性，甚至在2000 ppm一氧化碳下也具有抗毒性。该质子交换膜电解槽的峰值功率密度为1.63 W cm，并且保持相当的抗一氧化碳中毒性能。
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