All‐Round Enhancement of Wide pH Hydrogen Evolution Enabled by Tungsten‐Based Amorphous Alloy‐Mediated Adjacent Platinum Atoms
Jianhua Zhang, Kailing Zhou, Yong‐Zheng Zhang, Hao Wang
Abstract
Abstract Electrochemical water splitting based on single‐atom catalysts (SACs) offers a sustainable route for hydrogen production. However, conventional SACs suffer from weak synergistic effects in harsh electrolytes. Here, we report a tungsten‐based amorphous alloy (FeNiWPB) supported adjacent Platinum single‐atom catalyst (Pt ASSA @FeNiWPB). Spectroscopic and computational analyses disclose that the amorphous W‐based alloy matrix provides abundant defect sites to anchor and mediate adjacent Pt atoms, thereby boosting multiple H conversions via metal‐metal synergy. Additionally, the catalyst's corrosion resistance is significantly enhanced through the formation of robust M─W bonds (M═Pt, Fe, Ni), which effectively suppress metal leaching across broad pH ranges. Furthermore, the formation of Pt‐W/Fe/Ni polarized pairs at the alloy surface via Pt‐support interactions induces electron redistribution and accelerates H * /OH * adsorption kinetics, thereby enhancing multiple H 2 O * dissociation pathways. Consequently, Pt ASSA @FeNiWPB exhibits ultralow overpotentials of 17 mV (acidic) and 18 mV (alkaline) at −10 mA cm −2 , with mass activities 5.8 times (acidic) and 63.6 times (alkaline) higher than commercial Pt/C. Notably, it maintains performance for 600 h in both acidic and alkaline environments, far exceeding W‐free counterparts (<50 h) and previous reports, positioning it at the forefront of HER performance. This work establishes a universal strategy for engineering durable electrocatalysts.Electrochemical water splitting based on single‐atom catalysts (SACs) offers a sustainable route for hydrogen production. However, conventional SACs suffer from weak synergistic effects in harsh electrolytes. Here, we report a tungsten‐based amorphous alloy (FeNiWPB) supported adjacent Platinum single‐atom catalyst (Pt ASSA @FeNiWPB). Spectroscopic and computational analyses disclose that the amorphous W‐based alloy matrix provides abundant defect sites to anchor and mediate adjacent Pt atoms, thereby boosting multiple H conversions via metal‐metal synergy. Additionally, the catalyst's corrosion resistance is significantly enhanced through the formation of robust M─W bonds (M═Pt, Fe, Ni), which effectively suppress metal leaching across broad pH ranges. Furthermore, the formation of Pt‐W/Fe/Ni polarized pairs at the alloy surface via Pt‐support interactions induces electron redistribution and accelerates H*/OH* adsorption kinetics, thereby enhancing multiple H2O* dissociation pathways. Consequently, Pt ASSA @FeNiWPB exhibits ultralow overpotentials of 17 mV (acidic) and 18 mV (alkaline) at −10 mA cm −2 , with mass activities 5.8 times (acidic) and 63.6 times (alkaline) higher than commercial Pt/C. Notably, it maintains performance for 600 h in both acidic and alkaline environments, far exceeding W‐free counterparts (<50 h) and previous reports, positioning it at the forefront of HER performance. This work establishes a universal strategy for engineering durable electrocatalysts.