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Promotion Effect of Modified Ni/C by La–Ce Oxide for Durable Hydrogen Evolution Reaction
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-08-30 , DOI: 10.1021/acssuschemeng.1c03715
Myeong Je Jang 1 , Juchan Yang 1 , Jaehoon Jeong 1 , Geul Han Kim 1, 2 , Chae Yeon Kwon 1, 3 , Nosang Vincent Myung 4 , Kyu Hwan Lee 1 , Sung Mook Choi 1
Affiliation  

Improved durability of transition metal electrocatalysts for the hydrogen evolution reaction (HER) is increasing in importance for commercialized, eco-friendly hydrogen production. In this study we report improved electrocatalytic activity and durability of Ni, which has potential in an alkaline atmosphere for HER via the interaction between Ni and La–Ce oxide (LCO). Excellent HER durability was guaranteed by the interaction between Ni and LCO, owing to changes in the electronic structure, improved activity, and durability of anion exchange membrane water electrolysis (AEMWE). The LCO promoted Ni nanoparticle deposition on carbon black (Ni-LCO/C); this showed a lower overpotential of 114 mVRHE at a current density of 10 mA cm–2 and higher long-term stability compared to Ni/C. This study demonstrates that the combination of Ni and LCO is a powerful way to improve the efficiency of AEMWE. This can be applied to high-efficiency hydrogen production.

中文翻译:

La-Ce氧化物改性Ni/C对耐久析氢反应的促进作用

提高用于析氢反应 (HER) 的过渡金属电催化剂的耐久性对于商业化、环保的氢气生产越来越重要。在这项研究中,我们报告了 Ni 的电催化活性和耐久性的提高,通过 Ni 和 La-Ce 氧化物(LCO)之间的相互作用,Ni 在碱性气氛中具有用于 HER 的潜力。由于阴离子交换膜水电解 (AEMWE) 的电子结构发生变化、活性提高和耐久性提高,Ni 和 LCO 之间的相互作用保证了优异的 HER 耐久性。LCO促进了Ni纳米颗粒在炭黑上的沉积(Ni-LCO/C);这表明电流密度为 10 mA cm –2时的过电位较低,为 114 mV RHE与 Ni/C 相比具有更高的长期稳定性。这项研究表明,Ni 和 LCO 的组合是提高 AEMWE 效率的有效方法。这可以应用于高效制氢。
更新日期:2021-09-20
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