TY - JOUR
T1 - Alternating Current Techniques for a Better Understanding of Photoelectrocatalysts
AU - Karthik, Pitchiah E.
AU - Jothi, Vasanth Rajendiran
AU - Pitchaimuthu, Sudhagar
AU - Yi, Sung Chul
AU - Anantharaj, Sengeni
N1 - Funding Information:
The authors P.E.K., V.R., and S.C.Y.I. acknowledge the financial support provided by the National Research Foundation of Korea (2019M3E6A1063863) and were grateful to Hanyang University, South Korea for its facilities. S.A. acknowledges the funding support from WRISE, Waseda University, Tokyo, Japan.
Publisher Copyright:
© 2021 American Chemical Society
PY - 2021/10/15
Y1 - 2021/10/15
N2 - Several spectroscopic and electroanalytical techniques are in use when it comes to the investigation of interfaces in photoelectrocatalysis (PEC). Among them, AC techniques are the least used ones except for electrochemical impedance analysis despite having several advantages over DC electroanalytical techniques. Though AC electrolysis of water was known in the early years of the 20th century, it was not given significant attention either. In this Perspective, we discuss how these barely used yet powerful AC techniques, namely, (1) Mott-Schottky in impedance and photoelectrochemical impedance analyses (equivalent circuit analysis, capacitance spectroscopy), (2) intensity-modulated photocurrent spectroscopy (IMPS), (3) FS-HA-FT-AC voltammetry, and (4) paired electrolysis, can lead us ahead in the way of further fathoming interfaces in PEC with highlights on prospects of these AC techniques for energy conversion reactions.
AB - Several spectroscopic and electroanalytical techniques are in use when it comes to the investigation of interfaces in photoelectrocatalysis (PEC). Among them, AC techniques are the least used ones except for electrochemical impedance analysis despite having several advantages over DC electroanalytical techniques. Though AC electrolysis of water was known in the early years of the 20th century, it was not given significant attention either. In this Perspective, we discuss how these barely used yet powerful AC techniques, namely, (1) Mott-Schottky in impedance and photoelectrochemical impedance analyses (equivalent circuit analysis, capacitance spectroscopy), (2) intensity-modulated photocurrent spectroscopy (IMPS), (3) FS-HA-FT-AC voltammetry, and (4) paired electrolysis, can lead us ahead in the way of further fathoming interfaces in PEC with highlights on prospects of these AC techniques for energy conversion reactions.
KW - AC voltammetry
KW - electroanalytical tools
KW - impedance analysis
KW - paired electrolysis
KW - photoelectrocatalysis
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U2 - 10.1021/acscatal.1c03783
DO - 10.1021/acscatal.1c03783
M3 - Article
AN - SCOPUS:85117793657
SN - 2155-5435
VL - 11
SP - 12763
EP - 12776
JO - ACS Catalysis
JF - ACS Catalysis
IS - 20
ER -