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- Title
Bias-free solar hydrogen production at 19.8 mA cm<sup>−2</sup> using perovskite photocathode and lignocellulosic biomass.
- Authors
Choi, Yuri; Mehrotra, Rashmi; Lee, Sang-Hak; Nguyen, Trang Vu Thien; Lee, Inhui; Kim, Jiyeong; Yang, Hwa-Young; Oh, Hyeonmyeong; Kim, Hyunwoo; Lee, Jae-Won; Kim, Yong Hwan; Jang, Sung-Yeon; Jang, Ji-Wook; Ryu, Jungki
- Abstract
Solar hydrogen production is one of the ultimate technologies needed to realize a carbon-neutral, sustainable society. However, an energy-intensive water oxidation half-reaction together with the poor performance of conventional inorganic photocatalysts have been big hurdles for practical solar hydrogen production. Here we present a photoelectrochemical cell with a record high photocurrent density of 19.8 mA cm−2 for hydrogen production by utilizing a high-performance organic–inorganic halide perovskite as a panchromatic absorber and lignocellulosic biomass as an alternative source of electrons working at lower potentials. In addition, value-added chemicals such as vanillin and acetovanillone are produced via the selective depolymerization of lignin in lignocellulosic biomass while cellulose remains close to intact for further utilization. This study paves the way to improve solar hydrogen productivity and simultaneously realize the effective use of lignocellulosic biomass. While light-driven water splitting offers a means to produce renewable H2 fuel, water oxidation limits performances and yields low-value products. Here, authors demonstrate a photoelectrochemical cell that converts lignocellulosic biomass into valuable products alongside H2.
- Subjects
LIGNOCELLULOSE; PHOTOELECTROCHEMISTRY; HYDROGEN production; BIOMASS; PHOTOELECTROCHEMICAL cells; PEROVSKITE; OXIDATION of water
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-33435-1