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Green Reduction of Cobalt Ferrocyanide with Excellent Electrocatalytic Activity toward the Oxygen Evolution Reaction
Energy & Fuels ( IF 5.2 ) Pub Date : 2022-01-22 , DOI: 10.1021/acs.energyfuels.1c03875
Bakthavachalam Vishnu 1 , Selvam Mathi 1 , Sundarraj Sriram 1 , B. Karthikeyan 1 , Jayaraman Jayabharathi 1
Affiliation  

The development of earth-friendly efficient electrocatalysts for the oxygen evolution reaction (OER) becomes crucial for renewable energy production. In this work, green synthesized reduced cobalt ferrocyanide at different time intervals (RCFC-t) was demonstrated as an effective and long-lasting electrocatalyst for the OER process. The RCFC-10 loaded glassy carbon electrode runs at an overpotential of 321 mV (1.55 V) at 10 mA cm–2, and a lower overpotential of 291 mV exhibited by the optimal RCFC-10/nickel foam was almost comparable to the benchmark catalyst, such as IrO2. This newborn RCFC-10 shows excellent OER performance and durability over 250 h with 4.1% potential loss in alkaline medium. At 1.58 V, the solar-driven water electrolysis demonstration supports the efficiency of a newborn electrocatalyst in solar-to-hydrogen conversion. These research findings confirm that low-cost greener synthesized RCFC-10/NF can be used for large-scale hydrogen generation.

中文翻译:

对析氧反应具有优异电催化活性的亚铁氰化钴的绿色还原

开发用于析氧反应(OER)的环保高效电催化剂对于可再生能源的生产至关重要。在这项工作中,绿色合成的还原型亚铁氰化钴在不同的时间间隔 (RCFC- t ) 被证明是用于 OER 过程的有效且持久的电催化剂。负载 RCFC-10 的玻碳电极在 10 mA cm –2下以 321 mV (1.55 V) 的过电位运行,最佳 RCFC-10/镍泡沫表现出的 291 mV 较低的过电位几乎与基准催化剂相当, 如 IrO 2. 这种新生的 RCFC-10 在 250 小时内表现出出色的 OER 性能和耐久性,在碱性介质中的潜在损失为 4.1%。在 1.58 V 电压下,太阳能驱动的水电解演示支持了新生电催化剂在太阳能到氢气转换中的效率。这些研究结果证实,低成本、绿色合成的 RCFC-10/NF 可用于大规模制氢。
更新日期:2022-02-03
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