High-Yield Electrosynthesis of Hydrogen Peroxide from Oxygen Reduction by Hierarchically Porous Carbon
High-Yield Electrosynthesis of Hydrogen Peroxide from Oxygen Reduction by Hierarchically Porous Carbon
复制标题
多级孔碳氧还原高产率电合成过氧化氢
DOI：
10.1002/anie.201502396
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发表时间：
2015-06-01
影响因子：
16.6
通讯作者：
Chen, Shuo
中科院分区：
文献类型：
--
作者：
Liu, Yanming;Quan, Xie;Chen, Shuo
通过 O-2 电还原生产 H2O2 是当前蒽醌工艺的一种有吸引力的替代方案，这对于化学工业和环境修复来说是非常理想的。然而，开发具有成本效益的 H2O2 合成电催化剂仍然是一个巨大的挑战。在此，提出了分级多孔碳（HPC）用于 O-2 还原电合成 H2O2。它表现出高O-2还原活性和良好的H2O2选择性（95.0-70.2%，大多数在pH1-4时>90.0%，在pH7时>80.0%）。在HPC上实现了高产H2O2生成，在pH1-7和-0.5V下，H2O2浓度为222.6-62.0mmolL(-1)(2.5h)，相应的H2O2产率为395.7-110.2mmolh(-1)g(-1)。此外，HPC对于H2O2生产来说是节能的，电流效率为81.8-70.8%。 HPC 在电合成 H2O2 方面的优异性能可归因于其高 sp(3)-C 含量和缺陷、大表面积和快速传质。
H2O2 production by electroreduction of O-2 is an attractive alternative to the current anthraquinone process, which is highly desirable for chemical industries and environmental remediation. However, it remains a great challenge to develop cost-effective electrocatalysts for H2O2 synthesis. Here, hierarchically porous carbon (HPC) was proposed for the electrosynthesis of H2O2 from O-2 reduction. It exhibited high activity for O-2 reduction and good H2O2 selectivity (95.0-70.2%, most of them >90.0% at pH1-4 and >80.0% at pH7). High-yield H2O2 generation has been achieved on HPC with H2O2 concentrations of 222.6-62.0mmolL(-1) (2.5h) and corresponding H2O2 production rates of 395.7-110.2mmolh(-1)g(-1) at pH1-7 and -0.5V. Moreover, HPC was energy-efficient for H2O2 production with current efficiency of 81.8-70.8%. The exceptional performance of HPC for electrosynthesis of H2O2 could be attributed to its high content of sp(3)-C and defects, large surface area and fast mass transfer.