Pt-Quantum-Dot-Modified Sulfur-Doped NiFe Layered Double Hydroxide for High-Current-Density Alkaline Water Splitting at Industrial Temperature
Pt-Quantum-Dot-Modified Sulfur-Doped NiFe Layered Double Hydroxide for High-Current-Density Alkaline Water Splitting at Industrial Temperature
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DOI：
10.1002/adma.202208209
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发表时间：
2023-03-04
影响因子：
29.4
通讯作者：
Mai, Wenjie
中科院分区：
文献类型：
--
作者：
Lei, Hang;Wan, Qixiang;Mai, Wenjie
用于工业水裂解的合适的电催化剂确实可以促进实际的氢应用。合理的表面设计对于电催化剂在水裂解中弥合基础科学与工业期望之间的差距具有特别重要的意义。本文设计了Pt量子点修饰的硫掺杂NiFe层状双金属氢氧化物（Pt@S-NiFe LDHs），在工业条件下对析氢反应具有良好的催化活性。Pt@S-NiFe LDHs由于结合能、传质和释氢能力的增强，在高电流密度下表现出优异的HER活性。值得注意的是，它获得了一个令人印象深刻的低过电位71 mV和长期稳定性200小时，在100 mA cm（-2），超过商业40%的Pt/C和大多数报道的Pt基电催化剂。其质量活性是40%Pt/C的2.7倍，过电位为100 mV。在工业温度（65 ℃）下，Pt@S-NiFe LDH电解槽电流密度达到100 mA cm（-2）仅需1.62 V，优于40%Pt/C//IrO 2的工业电解槽电流密度上级。本工作为开发高电流密度下工业高温水裂解电催化剂提供了合理的思路。
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(-2), 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 degrees C), the electrolyzer based on Pt@S-NiFe LDH needs just 1.62 V to reach the current density of 100 mA cm(-2), superior to that of the commercial one of 40% Pt/C//IrO2. This work provides rational ideas to develop electrocatalysts with exceptional performance for industrial high-temperature water splitting at high current densities.