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Nitrogen, Sulfur Co-Doped Hierarchically Porous Carbon as a Metal-Free Electrocatalyst for Oxygen Reduction and Carbon Dioxide Reduction Reaction.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-09-09 , DOI: 10.1021/acsami.0c06506 Ruru Li 1 , Feng Liu 1 , Yihao Zhang 1 , Mingming Guo 2 , Dong Liu 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-09-09 , DOI: 10.1021/acsami.0c06506 Ruru Li 1 , Feng Liu 1 , Yihao Zhang 1 , Mingming Guo 2 , Dong Liu 1
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High-cost and low-efficiency electrocatalysts have hindered oxygen reduction reaction (ORR) in fuel cells and CO2 reduction reaction (CO2RR) for producing fuels and value-added chemicals. Here, a low-cost metal-free electrocatalyst of a N, S co-doped hierarchically porous carbon (NSHPC) for efficient ORR and CO2RR is reported. The NSHPC is prepared by pyrolysis of glucosamine hydrochloride and thiocyanuric acid precursors using SiO2 as hard templates. The N, S co-doping effectively enhances catalytic activity and selectivity, and the hierarchically porous structure largely exposes abundant active sites to reaction species and facilitates electrolyte transport, thereby leading to significantly increased catalytic activities for the NSHPC. The resultant NSHPC exhibits excellent electrocatalytic activities toward ORR in both acidic and alkaline electrolytes and also shows application in proton exchange membrane fuel cells (PEMFCs). More importantly, the NSHPC enables CO2 reduction to CO with 87.8% maximum Faraday efficiency (FE) in aqueous electrolytes. This work offers a novel insight into the development of multifunctional electrocatalysts for producing electricity, fuels, and value-added chemicals.
中文翻译：
氮，硫共掺杂的多孔碳作为无金属的电催化剂，用于氧还原和二氧化碳还原反应。
高成本和低效率的电催化剂阻碍了燃料电池中的氧还原反应（ORR）和阻碍了生产燃料和增值化学品的CO 2还原反应（CO 2 RR）。在此，报道了用于有效ORR和CO 2 RR的N，S共掺杂的分级多孔碳（NSHPC）的低成本无金属电催化剂。NSHPC是通过使用SiO 2热解盐酸氨基葡萄糖和硫氰尿酸前体制备的作为硬模板。N，S共掺杂有效地增强了催化活性和选择性，并且分层的多孔结构在反应物种中大量暴露了丰富的活性位点，并促进了电解质的运输，从而导致NSHPC的催化活性大大提高。所得的NSHPC在酸性和碱性电解质中均表现出对ORR的优异电催化活性，并且还显示出在质子交换膜燃料电池（PEMFC）中的应用。更重要的是，NSHPC使含水电解质中的CO 2还原为CO的最大法拉第效率（FE）为87.8％。这项工作为开发用于生产电力，燃料和增值化学品的多功能电催化剂提供了新颖的见解。
更新日期：2020-10-07
中文翻译：
氮，硫共掺杂的多孔碳作为无金属的电催化剂，用于氧还原和二氧化碳还原反应。
高成本和低效率的电催化剂阻碍了燃料电池中的氧还原反应（ORR）和阻碍了生产燃料和增值化学品的CO 2还原反应（CO 2 RR）。在此，报道了用于有效ORR和CO 2 RR的N，S共掺杂的分级多孔碳（NSHPC）的低成本无金属电催化剂。NSHPC是通过使用SiO 2热解盐酸氨基葡萄糖和硫氰尿酸前体制备的作为硬模板。N，S共掺杂有效地增强了催化活性和选择性，并且分层的多孔结构在反应物种中大量暴露了丰富的活性位点，并促进了电解质的运输，从而导致NSHPC的催化活性大大提高。所得的NSHPC在酸性和碱性电解质中均表现出对ORR的优异电催化活性，并且还显示出在质子交换膜燃料电池（PEMFC）中的应用。更重要的是，NSHPC使含水电解质中的CO 2还原为CO的最大法拉第效率（FE）为87.8％。这项工作为开发用于生产电力，燃料和增值化学品的多功能电催化剂提供了新颖的见解。
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