Enhancing Electrocatalytic Production of H2O2 by Modulating Coordination Environment of Cobalt Center,Bulletin of the Korean Chemical Society

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Enhancing Electrocatalytic Production of H2O2 by Modulating Coordination Environment of Cobalt Center
Bulletin of the Korean Chemical Society ( IF 2.3 ) Pub Date : 2021-06-30 , DOI: 10.1002/bkcs.12348
Guoling Wu _{1,

2,

3} , Zhongjie Yang _{2,

3} , Tianlin Zhang ₃ , Yali Sun _{2,

3} , Chang Long ₄ , Yaru Song ₁ , Shengbin Lei ₁ , Zhiyong Tang _{2,

3}

Affiliation

As an environmentally friendly oxidant, H₂O₂ is widely utilized in various fields; however, its production methods remain limited to the chemical anthraquinone process. Alternatively, electrocatalytic oxygen reduction possesses numerous notable advantages (e.g., cost-effectiveness, small-scale, and distributed nature). As electrocatalytic oxygen reduction has been widely investigated in the fields of fuel cells and metal-air batteries, the mechanism of the 2e⁻-ORR pathway for producing H₂O₂ is not sufficiently clear. Herein, we explore the effect of the cobalt (Co) coordination environment on the electrochemical production of H₂O₂. The detailed investigation on N-, P-, and S-coordinated Co catalysts (Co₁N₁N₃, Co₁P₁N₃, and Co₁S₁N₃) demonstrates that changing the coordination environment evidently affects the H₂O₂ selectivity, and the S-coordinated Co exhibits the best catalytic performance. This finding would lead to the design and selection of catalysts at atomic level for producing H₂O₂ via electrocatalytic oxygen reduction.

中文翻译：

通过调节钴中心的配位环境提高 H2O2 的电催化生产

H ₂ O ₂作为一种环保型氧化剂，被广泛应用于各个领域；然而，其生产方法仍仅限于化学蒽醌法。或者，电催化氧还原具有许多显着的优势（例如，成本效益、小规模和分布式性质）。由于电催化氧还原在燃料电池和金属-空气电池领域得到广泛研究，2e ^- -ORR途径产生H ₂ O ₂的机制尚不十分清楚。在此，我们探讨了钴 (Co) 配位环境对电化学生成 H ₂ O _{2 的影响}. 对N-、P-和S-配位Co催化剂（Co ₁ N ₁ N ₃、Co ₁ P ₁ N ₃和Co ₁ S ₁ N ₃）的详细研究表明，改变配位环境明显影响H ₂ O ₂选择性，S-配位的Co表现出最好的催化性能。这一发现将导致在原子水平上设计和选择用于通过电催化氧还原生产 H ₂ O _{2 的}催化剂。

更新日期：2021-08-19

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