PtNi-W/C with Atomically Dispersed Tungsten Sites Toward Boosted ORR in Proton Exchange Membrane Fuel Cell Devices

• DOI: 10.1007/s40820-023-01102-9
• Publication Date: 2023-06-02T07:28:14Z
• Authors: Huawei Wang; Jialong Gao; Changli Chen; Wei Zhao; Zihou Zhang; Dong Li; Ying Chen; Chenyue Wang; Cheng Zhu; Xiaoxing Ke; Jiajing Pei; Juncai Dong; Qi Chen; Haibo Jin; Maorong Chai; Yujing Li
• Keywords: Technology; Synergistic catalysis; Oxygen reduction; T; Membrane electrode assembly; PGM catalyst; Fuel cells; 7. Clean energy; Article

The performance of proton exchange membrane fuel cells is heavily dependent on the microstructure electrode catalyst especially at low loadings. This work shows a hybrid electrocatalyst consisting PtNi-W alloy nanocrystals loaded carbon surface with atomically dispersed W sites by two-step straightforward method. Single-atomic can be found surface, which form protonic acid and establish an extended transport network surface. When implemented in assembly as cathode ultra-low loading 0.05 mgPt cm-2, peak power density cell enhanced 64.4% compared to that commercial Pt/C catalyst. theoretical calculation suggests single-atomic possesses favorable energetics toward formation *OOH whereby intermediates efficiently converted further reduced water, revealing interfacial cascade catalysis facilitated W. highlights novel functional design from atomic level enables solve bottle-neck issues device level.