Universität zu Köln

Xia, Chengkai, Surendran, Subramani ORCID: 0000-0003-0750-3199, Ji, Seulgi, Kim, Dohun, Chae, Yujin, Kim, Jaekyum, Je, Minyeong, Han, Mi-Kyung, Choe, Woo-Seok, Choi, Chang Hyuck ORCID: 0000-0002-2231-6116, Choi, Heechae ORCID: 0000-0002-9390-6607, Kim, Jung Kyu ORCID: 0000-0002-8218-0062 and Sim, Uk (2022). A sulfur self-doped multifunctional biochar catalyst for overall water splitting and a supercapacitor from Camellia japonica flowers. Carbon Energy, 4 (4). S. 491 - 506. HOBOKEN: WILEY. ISSN 2637-9368

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Abstract

A versatile use of a sulfur self-doped biochar derived from Camellia japonica (camellia) flowers is demonstrated as a multifunctional catalyst for overall water splitting and a supercapacitor. The native sulfur content in the camellia flower facilitates in situ self-doping of sulfur, which highly activates the camellia-driven biochar (SA-Came) as a multifunctional catalyst with the enhanced electron-transfer ability and long-term durability. For water splitting, an SA-Came-based electrode is highly stable and shows reaction activities in both hydrogen and oxygen evolution reactions, with overpotentials of 154 and 362 mV at 10 mA cm(-2), respectively. For supercapacitors, SA-Came achieves a specific capacitance of 125.42 F g(-1) at 2 A g(-1) and high cyclic stability in a three-electrode system in a 1 M KOH electrolyte. It demonstrated a high energy density of 34.54 Wh kg(-1) at a power density of 1600 W kg(-1) as a symmetric hybrid supercapacitor device with a wide working potential range of 0-1.6 V.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Xia, Chengkai UNSPECIFIED UNSPECIFIED UNSPECIFIED Surendran, Subramani UNSPECIFIED orcid.org/0000-0003-0750-3199 UNSPECIFIED Ji, Seulgi UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Dohun UNSPECIFIED UNSPECIFIED UNSPECIFIED Chae, Yujin UNSPECIFIED UNSPECIFIED UNSPECIFIED Kim, Jaekyum UNSPECIFIED UNSPECIFIED UNSPECIFIED Je, Minyeong UNSPECIFIED UNSPECIFIED UNSPECIFIED Han, Mi-Kyung UNSPECIFIED UNSPECIFIED UNSPECIFIED Choe, Woo-Seok UNSPECIFIED UNSPECIFIED UNSPECIFIED Choi, Chang Hyuck UNSPECIFIED orcid.org/0000-0002-2231-6116 UNSPECIFIED Choi, Heechae UNSPECIFIED orcid.org/0000-0002-9390-6607 UNSPECIFIED Kim, Jung Kyu UNSPECIFIED orcid.org/0000-0002-8218-0062 UNSPECIFIED Sim, Uk UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-683383
DOI:	10.1002/cey2.207
Journal or Publication Title:	Carbon Energy
Volume:	4
Number:	4
Page Range:	S. 491 - 506
Date:	2022
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	2637-9368
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HYDROGEN EVOLUTION REACTION; POROUS CARBON MATERIALS; OXYGEN REDUCTION; ACTIVATED CARBON; ELECTRODE MATERIALS; ENERGY-STORAGE; BIOMASS; WASTE; PERFORMANCE; PROGRESS Multiple languages Chemistry, Physical; Energy & Fuels; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68338