TY - JOUR
T1 - A Water-Splitting Carbon Nitride Photoelectrochemical Cell with Efficient Charge Separation and Remarkably Low Onset Potential
AU - Peng, Guiming
AU - Albero, Josep
AU - Garcia, Hermenegildo
AU - Shalom, Menny
N1 - Publisher Copyright: © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/11/26
Y1 - 2018/11/26
N2 - A simple method to grow a closely packed carbon nitride (CN) film by the crystallization of CN monomers on a conductive substrate followed by a thermal condensation is reported. The as-synthesized CN exhibits excellent performance as photoanode material in a photoelectrochemical cell. Detailed (photo)electrochemical and transient absorption measurements indicate excellent charge separation properties, high hole-extraction efficiency (up to 50 %), a long electron lifetime, and low amount of defect states below the CN conduction band. Consequently, the CN photoanode exhibits a markedly low overpotential of 0.25 V versus reversible hydrogen electrode (RHE), which is comparable with the state-of-the-art metal-based photoanodes, an impressive photocurrent density of 116 μA cm−2 at 1.23 V versus RHE in an alkaline solution without sacrificial agent, as well as excellent stability over a wide pH range (0–13).
AB - A simple method to grow a closely packed carbon nitride (CN) film by the crystallization of CN monomers on a conductive substrate followed by a thermal condensation is reported. The as-synthesized CN exhibits excellent performance as photoanode material in a photoelectrochemical cell. Detailed (photo)electrochemical and transient absorption measurements indicate excellent charge separation properties, high hole-extraction efficiency (up to 50 %), a long electron lifetime, and low amount of defect states below the CN conduction band. Consequently, the CN photoanode exhibits a markedly low overpotential of 0.25 V versus reversible hydrogen electrode (RHE), which is comparable with the state-of-the-art metal-based photoanodes, an impressive photocurrent density of 116 μA cm−2 at 1.23 V versus RHE in an alkaline solution without sacrificial agent, as well as excellent stability over a wide pH range (0–13).
KW - carbon nitride
KW - crystalline 2D materials
KW - photoanode
KW - photoelectrochemical cells
KW - water splitting
UR - http://www.scopus.com/inward/record.url?scp=85056149101&partnerID=8YFLogxK
U2 - https://doi.org/10.1002/anie.201810225
DO - https://doi.org/10.1002/anie.201810225
M3 - Article
SN - 1433-7851
VL - 57
SP - 15807
EP - 15811
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 48
ER -