Electronic structure engineering through Fe-doping CoP enables hydrogen evolution coupled with electro-Fenton
Electronic structure engineering through Fe-doping CoP enables hydrogen evolution coupled with electro-Fenton
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通过 Fe 掺杂 CoP 的电子结构工程可与电芬顿耦合实现析氢
DOI：
10.1016/j.nanoen.2021.105943
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发表时间：
2021
期刊：
影响因子：
17.6
通讯作者：
Tao Shengyang
中科院分区：
文献类型：
--
作者：
Wang Honglei;Wang Yuchao;Zhang Jiangwei;Liu Xin;Tao Shengyang
提高电化学析氢反应（HER）的能量利用率是一个有意义但具有挑战性的课题。电Fenton法代替传统的析氧法是一种有效的方法。对于高效电芬顿来说，本文通过Fe的掺杂优化了CoP/C的电子结构，提高了CoFeP/C的载流子密度，产生了更多的羟基自由基（·OH），这一点得到了表征和密度泛函理论计算（DFT）分析的证实。同时，由于CoP/C具有良好的电子转移载体多刺结构和高含量的P元素，其在10 mA cm-2下的过电位为42.1 mV（vs. RHE），Tafel斜率为59 mV dec-1，表现出优异的HER活性。采用CoP/C为阴极H2，CoFeP/C为阳极电芬顿的电化学流动反应器仅需1.68 V的低恒压。为了优化电极调节，电芬顿可以被认为是一个理想的氧化反应，以提高能源效率，在合理设计的反应器。HER与电芬顿的组合支持我们设计的反应器在可持续能源和环境修复领域具有很高的潜力。
Improving the utilization of energy in the electrochemical hydrogen evolution reaction (HER) is a meaningful but challenging task. Coupling the HER with electro-Fenton instead of oxygen evolution is an effective method. For high-efficiency electro-Fenton, herein, the electron structure of CoP/C was optimized due to the doping of Fe to improve the carrier density of CoFeP/C and produce more hydroxyl radicals (·OH), which was confirmed by both characterization and density functional theory calculation (DFT) analysis. Meanwhile, CoP/C exhibits excellent HER activity with an overpotential of 42.1 mV (vs. RHE) at 10 mA cm−2and a Tafel slope of 59 mV dec−1because of the favorable electron transfer vector spiny structure and the high content of P element. The electrochemical flow reactor employing CoP/C for cathodic H2and adopting CoFeP/C for anodic electro-Fenton requires only a low constant voltage of 1.68 V. For optimal electrode adjustment, electro-Fenton can be considered as an ideal oxidation reaction to promote the energy efficiency in the rationally designed reactor. Combination HER with electro-Fenton supports that our designed reactor has high potential in the fields of sustainable energy and environmental remediation.