@article {48157,
	title = {Morphology-tuned Pt3Ge accelerates water dissociation to industrial-standard hydrogen production over a wide pH range},
	journal = {Advanced Materials},
	volume = {34},
	year = {2022},
	month = {JUL},
	pages = {2202294},
	type = {Article},
	abstract = {<p>
	The discovery of novel materials for industrial-standard hydrogen production is the present need considering the global energy infrastructure. A novel electrocatalyst, Pt3Ge, which is engineered with a desired crystallographic facet (202), accelerates hydrogen production by water electrolysis, and records industrially desired operational stability compared to the commercial catalyst platinum is introduced. Pt3Ge-(202) exhibits low overpotential of 21.7 mV (24.6 mV for Pt/C) and 92 mV for 10 and 200 mA cm(-2) current density, respectively in 0.5 m H2SO4. It also exhibits remarkable stability of 15 000 accelerated degradation tests cycles (5000 for Pt/C) and exceptional durability of 500 h (@10 mA cm(-2)) in acidic media. Pt3Ge-(202) also displays low overpotential of 96 mV for 10 mA cm(-2) current density in the alkaline medium, rationalizing its hydrogen production ability over a wide pH range required commercial operations. Long-term durability (\&gt;75 h in alkaline media) with the industrial level current density (\&gt;500 mA cm(-2)) has been demonstrated by utilizing the electrochemical flow reactor. The driving force behind this stupendous performance of Pt3Ge-(202) has been envisaged by mapping the reaction mechanism, active sites, and charge-transfer kinetics via controlled electrochemical experiments, ex situ X-ray photoelectron spectroscopy, in situ infrared spectroscopy, and in situ X-ray absorption spectroscopy further corroborated by first principles calculations.</p>
},
	keywords = {Electrochemistry, hydrogen production, intermetallics, water electrolysis},
	issn = {0935-9648},
	doi = {10.1002/adma.202202294},
	author = {Mondal, Soumi and Sarkar, Shreya and Bagchi, Debabrata and Das, Tisita and Das, Risov and Singh, Ashutosh Kumar and Prasanna, Ponnappa Kechanda and Vinod, C. P. and Chakraborty, Sudip and Peter, Sebastian C.}
}
@article {48094,
	title = {Potential- and time-dependent dynamic nature of an oxide-derived pdin nanocatalyst during electrochemical CO2 reduction},
	journal = {ACS Nano},
	volume = {16},
	year = {2022},
	month = {APR},
	pages = {6185-6196},
	type = {Article},
	abstract = {<p>
	Electrochemical reduction of CO2 into valuable fuels and chemicals is a promising route of replacing fossil fuels by reducing CO2 emissions and minimizing its adverse effects on the climate. Tremendous efforts have been carried out for designing efficient catalyst materials to selectively produce the desired product in high yield from CO2 by the electrochemical process. In this work, a strategy is reported to enhance the electrochemical CO2 reduction reaction (ECO2RR) by constructing an interface between a metal-based alloy (PdIn) nanoparticle and an oxide (In2O3), which was synthesized by a facile solution method. The oxide-derived PdIn surface has shown excellent eCO(2)RR activity and enhanced CO selectivity with a Faradaic efficiency (FE) of 92.13\% at -0.9 V (vs RHE). On the other hand, surface PdO formation due to charge transfer on the bare PdIn alloy reduces the CO2RR activity. With the support of in situ (EXAFS and IR) and ex situ (XPS, Raman) spectroscopic techniques, the optimum presence of the Pd-In-O interface has been identified as a crucial parameter for enhancing eCO(2)RR toward CO in a reducing atmosphere. The influence of eCO(2)RR duration is reported to affect the overall performance by switching the product selectivity from H-2 (from water reduction) to CO (from eCO(2)RR) on the oxide-derived alloy surface. This work also succeeded in the multifold enhancement of the current density by employing the gas diffusion electrode (GDE) and optimizing its process parameters in a flow cell configuration.</p>
},
	keywords = {CO2 reduction, Electrochemistry, heterostructure interface, in situ mechanism, nanocatalyst},
	issn = {1936-0851},
	doi = {10.1021/acsnano.1c11664},
	author = {Bagchi, Debabrata and Sarkar, Shreya and Singh, Ashutosh Kumar and Vinod, Chathakudath P. and Peter, Sebastian C.}
}
