Guangdong Engineering & Technology Research Centre of Graphene-Like Materials and Products, Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, China.
Siyuan Laboratory, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, 510632, China.
Adv Mater. 2023 Apr;35(15):e2208209. doi: 10.1002/adma.202208209. Epub 2023 Mar 4.
Suitable electrocatalysts for industrial water splitting can veritably promote practical hydrogen applications. Rational surface design is exceptionally significant for electrocatalysts to bridge the gap between fundamental science and industrial expectation in water splitting. Here, Pt-quantum-dot-modified sulfur-doped NiFe layered double hydroxides (Pt@S-NiFe LDHs) are designed with eximious catalytic activity toward hydrogen evolution reaction (HER) under industrial condition. Benefiting from enhanced binding energy, mass transfer, and hydrogen release, Pt@S-NiFe LDHs exhibit outstanding activity in HER at high current densities. Notably, it obtains an impressively low overpotential of 71 mV and long-term stability of 200 h at 100 mA cm , exceeding commercial 40% Pt/C and most reported Pt-based electrocatalysts. Its mass activity is 2.7 times higher than that of 40% Pt/C with an overpotential of 100 mV. Furthermore, at industrial temperature (65 °C), the electrolyzer based on Pt@S-NiFe LDH needs just 1.62 V to reach the current density of 100 mA cm , superior to that of the commercial one of 40% Pt/C//IrO . This work provides rational ideas to develop electrocatalysts with exceptional performance for industrial high-temperature water splitting at high current densities.
适合工业水分解的电催化剂确实可以促进实用的氢气应用。对于电催化剂来说，合理的表面设计对于缩小基础科学与工业预期在水分解方面的差距至关重要。在这里，设计了具有出色析氢反应（HER）催化活性的 Pt 量子点修饰的硫掺杂 NiFe 层状双氢氧化物（Pt@S-NiFe LDHs）。得益于增强的结合能、质量传递和氢释放，Pt@S-NiFe LDHs 在高电流密度下表现出优异的 HER 活性。值得注意的是，它在 100 mA cm 下获得了令人印象深刻的低过电位 71 mV 和 200 h 的长期稳定性，超过了商业 40%Pt/C 和大多数报道的 Pt 基电催化剂。其质量活性是具有 100 mV 过电位的 40%Pt/C 的 2.7 倍。此外，在工业温度（65°C）下，基于 Pt@S-NiFe LDH 的电解槽仅需 1.62 V 即可达到 100 mA cm 的电流密度，优于商业 40%Pt/C//IrO 的 1.65 V。这项工作为开发在高电流密度下具有出色性能的用于工业高温水分解的电催化剂提供了合理的思路。
