Activating Layered Double Hydroxide with Multivacancies by Memory Effect for Energy-Efficient Hydrogen Production at Neutral pH

Zijian Yuan; Seong-Min Bak; Pengsong Li; Yin Jia; Lirong Zheng; Yu Zhou; Lu Bai; Enyuan Hu; Xiao-Qing Yang; Zhao Cai; Yongming Sun; Xiaoming Sun

doi:10.1021/acsenergylett.9b00867

journal article·2019-06-14Open access

Activating Layered Double Hydroxide with Multivacancies by Memory Effect for Energy-Efficient Hydrogen Production at Neutral pH

Zijian Yuan, Seong-Min Bak, Pengsong Li, Yin Jia, Lirong Zheng, Yu Zhou, Lu Bai, Enyuan Hu, Xiao-Qing Yang, Zhao Cai, Yongming Sun, Xiaoming Sun

ACS Energy Letters· Volume 4· Issue 6

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Source abstract

Abstract

Sustainable water-splitting hydrogen production has long been considered one of the most promising energy conversion technologies, but enormous challenges remain: for instance, water electrolysis suffers from high overpotential and over energy consumption under neutral pH conditions. Here, taking advantage of the memory effect of layered double hydroxide (LDH), we report an energy-efficient neutral water electrolyzer material based on LDH with multiple vacancy defects. Benefiting from the improved electrical conductivity, larger electrochemical surface area (ECSA), and faster charge transfer, the NiFe LDH with O, Ni, and Fe vacancies exhibits a low overpotential of 87 mV at 10 mA/cm2 for hydrogen evolution reaction (HER) in a pH 7 buffer electrolyte. Impressively, the as-fabricated vacancy-containing NiFe LDH (v-NiFe LDH) splits water with a current density of 10 mA/cm2 at ∼1.60 V in a two-electrode device, outperforming most other water-splitting catalysts in neutral media. Such an electrolyzer setup could be powered by a commercial 2.0 V solar cell, producing hydrogen at a current density as high as 100 mA/cm2.

Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage Catalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Advanced Photocatalysis Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States

Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

School of Physics and Electronics, Hunan Key Laboratory for Super-Microstructure and Ultrafast Process, Central South University, Changsha 410083, China

National Center for Nanoscience & Technology, Beijing 100190, China

Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China

College of Energy, Beijing University of Chemical Technology, Beijing 100029, China

Funding

Ministry of Education of the People's Republic of China · China Postdoctoral Science Foundation · Vehicle Technologies Program · Ministry of Finance · National Natural Science Foundation of China

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