PMID- 34022729 OWN - NLM STAT- MEDLINE DCOM- 20210701 LR - 20210701 IS - 1095-7103 (Electronic) IS - 0021-9797 (Linking) VI - 600 DP - 2021 Oct 15 TI - Optimization of nickel selenide for hydrogen and oxygen evolution reactions by response surface methodology. PG - 324-337 LID - S0021-9797(21)00672-X [pii] LID - 10.1016/j.jcis.2021.05.003 [doi] AB - In this study, the electrocatalytic activity of Ni-Se electrode synthesized on nickel foam by pulse electrodeposition was optimized through the design of experiments (DOE) approach using the response surface methodology (RSM) for both hydrogen and oxygen evolution reactions. The frequency (f), duty cycle (dc), current density (i), and electrodeposition time (sum of t(on)s) were chosen as the parameters of the pulse electrodeposition method. The analyses of variance (ANOVA) were performed on the responses of the designed experiments that included the required overpotential at the current density of 10 mA/cm(2) for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) (eta(10,HER) and eta(10,OER)), active surface area (R(f)) and intrinsic electrocatalytic activity (i/R(f)). The results indicated that eta(10,HER), eta(10,OER), and R(f) are mainly influenced by duty cycle and electrodeposition time, while i/R(f) is affected by frequency and time. The optimized NiSe(2) electrode synthesized under optimal conditions of pulse electrodeposition (low duty cycle and prolonged electrodeposition time) showed the most desirable values for eta(10,HER), eta(10,OER), and R(f), equal to 44 mV (vs. RHE), 235 mV (vs. RHE) and 14700, respectively. The nanostructured NiSe(2) demonstrated the highest potential in the bifunctional application of OER and HER. CI - Copyright (c) 2021 Elsevier Inc. All rights reserved. FAU - Esmailzadeh, S AU - Esmailzadeh S AD - Department of Materials Engineering, Faculty of Engineering, Tarbiat Modares University, P.O. Box: 14115-143, Tehran, Iran. FAU - Shahrabi, T AU - Shahrabi T AD - Department of Materials Engineering, Faculty of Engineering, Tarbiat Modares University, P.O. Box: 14115-143, Tehran, Iran. Electronic address: tshahrabi34@modares.ac.ir. FAU - Yaghoubinezhad, Y AU - Yaghoubinezhad Y AD - Department of Materials Engineering, Birjand University of Technology, P.O. Box: 97175-569314, Birjand, Iran. FAU - Barati Darband, Gh AU - Barati Darband G AD - Materials and Metallurgical Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, 91775-1111, Mashhad, Iran. LA - eng PT - Journal Article DEP - 20210505 PL - United States TA - J Colloid Interface Sci JT - Journal of colloid and interface science JID - 0043125 RN - 7OV03QG267 (Nickel) RN - 7YNJ3PO35Z (Hydrogen) RN - S88TT14065 (Oxygen) SB - IM MH - Electrodes MH - Electroplating MH - *Hydrogen MH - *Nickel MH - Oxygen OTO - NOTNLM OT - Ni-Se nanostructure electrode OT - Optimization OT - Pulse electrodeposition OT - Response surface methodology COIS- Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2021/05/23 06:00 MHDA- 2021/07/02 06:00 CRDT- 2021/05/22 20:24 PHST- 2021/01/07 00:00 [received] PHST- 2021/04/27 00:00 [revised] PHST- 2021/05/01 00:00 [accepted] PHST- 2021/05/23 06:00 [pubmed] PHST- 2021/07/02 06:00 [medline] PHST- 2021/05/22 20:24 [entrez] AID - S0021-9797(21)00672-X [pii] AID - 10.1016/j.jcis.2021.05.003 [doi] PST - ppublish SO - J Colloid Interface Sci. 2021 Oct 15;600:324-337. doi: 10.1016/j.jcis.2021.05.003. Epub 2021 May 5.