Enhanced electrocatalytic hydrogen evolution with CoNiFe(Cr/V) based high entropy alloy electrodes
In this study, the electrocatalytic properties of single-phase face-centered cubic high entropy alloy electrodes with equiatomic compositions of CoNiFeCr, CoNiFeV, and CoNiFe(Cr/V) are explored for the hydrogen evolution reaction (HER) in 1M KOH and 0.5M H2SO4. Among these, the CoNiFe(Cr/V) High Ent...
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AIP Publishing LLC
2025-05-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/5.0271005 |
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| author | Tahir Nawaz Shahbaz Ahmad Wael Abuzaid Faisal Mustafa Waqas Ahmad Sami El-Khatib Mohamad Jawad Kaddoura Abdul Hai Alami Hussain Alawadhi Mehmet Egilmez |
| author_facet | Tahir Nawaz Shahbaz Ahmad Wael Abuzaid Faisal Mustafa Waqas Ahmad Sami El-Khatib Mohamad Jawad Kaddoura Abdul Hai Alami Hussain Alawadhi Mehmet Egilmez |
| author_sort | Tahir Nawaz |
| collection | DOAJ |
| description | In this study, the electrocatalytic properties of single-phase face-centered cubic high entropy alloy electrodes with equiatomic compositions of CoNiFeCr, CoNiFeV, and CoNiFe(Cr/V) are explored for the hydrogen evolution reaction (HER) in 1M KOH and 0.5M H2SO4. Among these, the CoNiFe(Cr/V) High Entropy Alloy (HEA) electrodes exhibited superior performance, achieving overpotentials of 277 and 45 mV (vs reference hydrogen electrode) at 10 mA/cm2 in alkaline and acidic media, respectively, surpassing their counterparts and approaching the efficiency of commercial Raney-Ni and Pt/C catalysts. Long-term stability tests, including steady state chronoamperometry and potentiodynamic cyclic voltammetry, revealed remarkable corrosion resistance in both environments. The catalytic activity was significantly enhanced by the inclusion of Cr and V. These oxyphilic elements, with their larger atomic radii, induce a heterogeneous surface charge distribution that enhances the electrocatalytic performance of the CoNiFe(Cr/V) HEA. This work highlights a promising candidate for HER applications and sets the stage for a broader exploration of high entropy alloys in advanced catalytic systems. |
| format | Article |
| id | doaj-art-84c362a1638c409eac1f65e2b02aac18 |
| institution | DOAJ |
| issn | 2166-532X |
| language | English |
| publishDate | 2025-05-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj-art-84c362a1638c409eac1f65e2b02aac182025-08-20T03:18:56ZengAIP Publishing LLCAPL Materials2166-532X2025-05-01135051114051114-1610.1063/5.0271005Enhanced electrocatalytic hydrogen evolution with CoNiFe(Cr/V) based high entropy alloy electrodesTahir Nawaz0Shahbaz Ahmad1Wael Abuzaid2Faisal Mustafa3Waqas Ahmad4Sami El-Khatib5Mohamad Jawad Kaddoura6Abdul Hai Alami7Hussain Alawadhi8Mehmet Egilmez9Department of Physics, College of Arts and Sciences, American University of Sharjah, Sharjah, United Arab EmiratesDepartment of Physics, College of Arts and Sciences, American University of Sharjah, Sharjah, United Arab EmiratesMaterials Research Center, American University of Sharjah, Sharjah, United Arab EmiratesDepartment of Physics, College of Arts and Sciences, American University of Sharjah, Sharjah, United Arab EmiratesMaterials Research Center, American University of Sharjah, Sharjah, United Arab EmiratesDepartment of Physics, College of Arts and Sciences, American University of Sharjah, Sharjah, United Arab EmiratesDepartment of Physics, College of Arts and Sciences, American University of Sharjah, Sharjah, United Arab EmiratesSustainable and Renewable Energy Engineering, University of Sharjah, P.O. Box 27272, Sharjah, United Arab EmiratesCenter for Advanced Materials Research, University of Sharjah, P.O. Box 27272, Sharjah, United Arab EmiratesDepartment of Physics, College of Arts and Sciences, American University of Sharjah, Sharjah, United Arab EmiratesIn this study, the electrocatalytic properties of single-phase face-centered cubic high entropy alloy electrodes with equiatomic compositions of CoNiFeCr, CoNiFeV, and CoNiFe(Cr/V) are explored for the hydrogen evolution reaction (HER) in 1M KOH and 0.5M H2SO4. Among these, the CoNiFe(Cr/V) High Entropy Alloy (HEA) electrodes exhibited superior performance, achieving overpotentials of 277 and 45 mV (vs reference hydrogen electrode) at 10 mA/cm2 in alkaline and acidic media, respectively, surpassing their counterparts and approaching the efficiency of commercial Raney-Ni and Pt/C catalysts. Long-term stability tests, including steady state chronoamperometry and potentiodynamic cyclic voltammetry, revealed remarkable corrosion resistance in both environments. The catalytic activity was significantly enhanced by the inclusion of Cr and V. These oxyphilic elements, with their larger atomic radii, induce a heterogeneous surface charge distribution that enhances the electrocatalytic performance of the CoNiFe(Cr/V) HEA. This work highlights a promising candidate for HER applications and sets the stage for a broader exploration of high entropy alloys in advanced catalytic systems.http://dx.doi.org/10.1063/5.0271005 |
| spellingShingle | Tahir Nawaz Shahbaz Ahmad Wael Abuzaid Faisal Mustafa Waqas Ahmad Sami El-Khatib Mohamad Jawad Kaddoura Abdul Hai Alami Hussain Alawadhi Mehmet Egilmez Enhanced electrocatalytic hydrogen evolution with CoNiFe(Cr/V) based high entropy alloy electrodes APL Materials |
| title | Enhanced electrocatalytic hydrogen evolution with CoNiFe(Cr/V) based high entropy alloy electrodes |
| title_full | Enhanced electrocatalytic hydrogen evolution with CoNiFe(Cr/V) based high entropy alloy electrodes |
| title_fullStr | Enhanced electrocatalytic hydrogen evolution with CoNiFe(Cr/V) based high entropy alloy electrodes |
| title_full_unstemmed | Enhanced electrocatalytic hydrogen evolution with CoNiFe(Cr/V) based high entropy alloy electrodes |
| title_short | Enhanced electrocatalytic hydrogen evolution with CoNiFe(Cr/V) based high entropy alloy electrodes |
| title_sort | enhanced electrocatalytic hydrogen evolution with conife cr v based high entropy alloy electrodes |
| url | http://dx.doi.org/10.1063/5.0271005 |
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