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Efficient Hydrogen Evolution Promoted by Short Pathway-Hydrogen Spillover Over P-Doped Pt3Co
ACS Energy Letters ( IF 19.3 ) Pub Date : 2023-11-21 , DOI: 10.1021/acsenergylett.3c02021
Chengfei Li 1 , Chuan Tian 2 , Haibo Tang 1 , Minrui Liu 1 , Lirong Zheng 3 , Fuzhi Huang 1, 2 , Gao-Ren Li 4 , Qi Li 1
ACS Energy Letters ( IF 19.3 ) Pub Date : 2023-11-21 , DOI: 10.1021/acsenergylett.3c02021
Chengfei Li 1 , Chuan Tian 2 , Haibo Tang 1 , Minrui Liu 1 , Lirong Zheng 3 , Fuzhi Huang 1, 2 , Gao-Ren Li 4 , Qi Li 1
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Developing highly active electrocatalysts for operating at industrial current density with a low overpotential still remains a major challenge. Herein, we developed a strategy of short pathway-hydrogen spillover to facilitate the high current density operation, in which the hydrogen-enriched phases transfer to hydrogen-deficient phases in P-doped Pt3Co anchored on N-doped carbon (P-Pt3Co/NC). This strategy alleviated the compromise between the long reaction pathway and the undesirable interfacial barrier of hydrogen spillover for metal–support electrocatalysts. Consequently, P-Pt3Co/NC demonstrates a low overpotential of 219 mV at 1.5 A cm–2 in acidic media. Comprehensive experiment and theoretical calculation results revealed that the doped and negatively charged P site possesses a large capacity for storing protons and subsequently transferring to the nearby hydrogen-deficient Pt site with favorable H2 desorption. This significantly increases the hydrogen coverage on the Pt to break the limitation of hydrogen transfer kinetics with a low energy carrier.
中文翻译:
P 掺杂 Pt3Co 上短路径氢溢出促进高效析氢
开发在工业电流密度下运行且过电势低的高活性电催化剂仍然是一个重大挑战。在此,我们开发了一种短路径氢溢出策略,以促进高电流密度操作,其中富氢相转移到锚定在 N 掺杂碳上的 P 掺杂 Pt 3 Co 中的贫氢相(P-Pt 3连/NC)。这种策略缓解了金属支撑电催化剂的长反应途径和不良的氢溢出界面屏障之间的折衷。因此,P-Pt 3 Co/NC在酸性介质中在 1.5 A cm –2下表现出 219 mV 的低过电势。综合实验和理论计算结果表明,掺杂且带负电的P位点具有很大的存储质子的能力,并随后转移到附近的缺氢Pt位点,并有利于H 2解吸。这显着增加了 Pt 上的氢覆盖率,打破了低能量载体氢转移动力学的限制。
更新日期:2023-11-21
中文翻译:

P 掺杂 Pt3Co 上短路径氢溢出促进高效析氢
开发在工业电流密度下运行且过电势低的高活性电催化剂仍然是一个重大挑战。在此,我们开发了一种短路径氢溢出策略,以促进高电流密度操作,其中富氢相转移到锚定在 N 掺杂碳上的 P 掺杂 Pt 3 Co 中的贫氢相(P-Pt 3连/NC)。这种策略缓解了金属支撑电催化剂的长反应途径和不良的氢溢出界面屏障之间的折衷。因此,P-Pt 3 Co/NC在酸性介质中在 1.5 A cm –2下表现出 219 mV 的低过电势。综合实验和理论计算结果表明,掺杂且带负电的P位点具有很大的存储质子的能力,并随后转移到附近的缺氢Pt位点,并有利于H 2解吸。这显着增加了 Pt 上的氢覆盖率,打破了低能量载体氢转移动力学的限制。