Transition metal sulfides have been established as an excellent hydrogen evolution reaction catalyst but their oxygen evolution reaction behaviour is still less explored and needs further investigations. Oxygen evolution reaction has a huge potential for fuel cell and air battery applications. Ashish et al. have synthesized MoS2 nanolayers on N-doped carbon wrapped cobalt submicrospheres shows excellent OER catalytic activity.
Hydrogen is one of the cleanest forms of energy which can solve several issues, including environmental pollution and depletion of fossils fuels. Hydrogen evolution reaction (HER), being a carbon-neutral process can reduce the carbon footprint in the earth’s atmosphere. Molybdenum based solids are among the most popular electrocatalysts, which have been explored extensively for HER processes as an alternative to Platinum. Herein, we report a nanostructured electrocatalyst (CuMoCat) consist of molybdenum carbide, molybdenum nitride, and elemental copper, forming a heterojunction within the composite. Copper doping in molybdenum carbide/nitride composite not only facilitates the lowering of the overpotential but also improves the catalyst to perform at high current density. CuMoCat exhibits an overpotential of 82 mV for attaining a current density of 10 mA cm-2 with a Tafel slope value of 33 mV/dec and shows excellent stability of 3000 cycles in acidic media. The theoretical study reveals that Cu doping brings a change in the electronic properties of the catalyst, which improves the overall adsorption and desorption of hydrogen on the catalyst surface during the hydrogen evolution reaction. The Free Energy diagram for ‘Mo’ and ‘N’ hydrogen adsorptions sites of CuMoCat displays, a shift of free energy making these more favourable for HER with respect to Mo/N sites of the un-doped catalyst.
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In-situ modulation of silica-supported MoO2/Mo2C heterojunction for enhanced hydrogen evolution reaction: Rajinder Kumar, Zubair Ahmed,Ravi Kumar,b Shambhu Nath Jha,b Dibyendu Bhattacharyya,b Chandan Bera,and,Vivek Bagchi, (2020) Catalysis Science and Technology, -: -. DOI: https://doi.org/10.1039/D0CY00890G
Promoting electrocatalytic oxygen reduction in a model composite using selective metal ions: Zubair Ahmed, Parrydeep K Sachdeva, Ritu Rai, Rajinder Kumar, Takahiro Maruyama,Chandan Bera , Vivek Bagchi, (2020) ACS Applied Energy Materials, 3: 3645. DOI: https://doi.org/10.1021/acsaem.0c00129
Probing into the effect of heterojunctions between Cu/Mo2C/Mo2N on HER performance: Rajinder Kumar, Zubair Ahmed, Harwinder Kaur, Chandan Bera, Vivek Bagchi, (2020) Catalysis Science and Technology, 10: 2213 - 2220. DOI: https://doi.org/10.1039/C9CY02526J
Hydrated FePO4 nanoparticles supported on P-doped RGO show enhanced ORR activity compared to their dehydrated form in an alkaline medium,: Zubair Ahmed, Ritu Rai, Rajinder Kumar, Takahiro Maruyama and Vivek Bagchi, (2019) RSC Advances, 9: 24654-24658. DOI: https://doi.org/10.1039/C9RA04070F
Uniformly Decorated Molybdenum Carbide/Nitride Nanostructures on Biomass Templates for Hydrogen Evolution Reaction Applications,: Rajinder Kumar, Zubair Ahmed, Ritu Rai, Ashish Gaur, Shilpa Kumari, Takahiro Maruyama, Vivek Bagchi*, (2019) ACS Omega, 491: 4155-14161. DOI: https://doi.org/10.1021/acsomega.9b02321
Environmentally Benign Metal-Free Reduction of GO Using Molecular Hydrogen: A Mechanistic Insight: Ritu Rai, Zubair Ahmed, Rajinder Kumar, Rameshwar L Kumawat, Kalyani Chordiya, Takahiro Maruyama,Md. Ehesan Ali,Vivek Bagchi*, (2018) ACS Omega, 3: 15112-15118. DOI: 10.1021/acsomega.8b00848
Comparative Nitrene-Transfer Chemistry to Olefinic Substrates Mediated by a Library of Anionic Mn(II) Triphenylamido-Amine Reagents and M(II) Congeners (M = Fe, Co, Ni) Favoring Aromatic over: Vivek Bagchi, Anshika Kalra , Purak Das, Amitava Choudhury, Zhicheng Sun , Thomas R. Cundari, and Pericles Stavropoulos, (2018) ACS Catalysis, 8: 9183–9206. DOI: 10.1021/acscatal.8b01941
Nano-structured hybrid Molybdenum Carbides / Nitrides generated in-situ for HER Applications;: Rajinder Kumar, Ritu Rai, Seema Gautam, Abir De Sarkar, N. Tiwari, Shambhu Nath Jha, Dibyendu Bhattacharyya, Ashok K Ganguli,Vivek Bagchi*, (2017) J. Mater. Chem. A,, . DOI: 10.1039/C7TA01815K
A Versatile Tripodal Cu(I) Reagent for C–N Bond Construction via Nitrene-Transfer Chemistry: Catalytic Perspectives and Mechanistic Insights on C–H Aminations/Amidinations and Olefin Aziridin: Patrina Paraskevopoulou , Purak Das , Lingyu Chi , Qiuwen Wang , Amitava Choudhury , Jennifer S. Mathieson , Leroy Cronin , Daniel B. Pardue , Thomas R. Cundari , George Mitrikas , Yiannis Sanakis ,Pericles Stavropoulos, (2014) J. Am. Chem. Soc., 136 (32): 11362–11381. DOI: 10.1021/ja503869j
Title: “Metalloporphyrin Catalyzed oxidation Reactions: Synthesis, Structure and Mechanism”, Indian Institute of Technology Delhi, India.
Inorganic Chemistry (Major), Organic Chemistry, Physical Chemistry, University of North Bengal, West Bengal, India.
Chemistry (Hons), Physics, Mathematics (Minor), University of North Bengal, India. (University of North Bengal, India) (First Class 3rd: Rank 3)
Scientist C:Institute of Nano Science and Technology,, Mohali, Punjab (January 2013 to Present till date )
Post Doctoral Research Associate:Missouri University of Science and Technology, Rolla,, MO, USA (August 2009 to September 2012 )
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