Abstract:rich chalcogenides composed of highly abundant elements recently emerged as promising catalysts for the electrocatalytic hydrogen evolution reaction (HER). Many of these materials benefit from a high intrinsic conductivity as compared to their chalcogen-rich congeners, greatly reducing the necessity for conductive additives or sophisticated nanostructuring. Herein, we showcase the high potential of metal-rich transitionmetal chalcogenides for the electrocatalytic hydrogen formation by summarizing the recent pr… Show more
“…Notably, the substitution of sulfur for selenium in the Fe/Ni‐pentlandite lattice results in insignificant changes to the ECSA, ranging from 0.0054 mF cm −2 ( Se‐5 ) to 0.0071 mF cm −2 ( Se‐3 ), across the investigated catalysts. This minimal effect of the S/Se exchange on the ECSA is also in good accordance to comparable CO 2 RR investigations employing sulfoselenides and suggests a similar electrode surface area . During electrolysis, the ECSA of the investigated electrode increases for all compounds.…”
The electrochemical reduction of CO 2 is an attractive strategy towards the mitigation of environmental pollution and production of bulk chemicals as well as fuels by renewables. The bimetallic sulfide Fe 4.5 Ni 4.5 S 8 (pentlandite) was recently reported as ac heap and robust catalyst for electrochemical water splitting, asw ell as for CO 2 reduction with a solvent-dependent product selectivity.I nspired by numerous reports on monometallic sulfoselenides and selenides revealing higher catalytic activity for the CO 2 reduction reaction (CO 2 RR) than their sulfide counterparts, the authors investigated the influence of stepwise S/Se exchange in seleno-pentlanditesF e 4.5 Ni 4.5 S 8-Y Se Y (Y = 1-5) and their ability to act as CO 2 reducingc atalysts. It is demonstrated that the incorporationo fh ighere quivalents of seleniumf avors the CO 2 RR with Fe 4.5 Ni 4.5 S 4 Se 4 revealingt he highest activity for CO formation. Under galvanostaticc onditions in acetonitrile, Fe 4.5 Ni 4.5 S 4 Se 4 generates CO with aF aradaic Efficiency close to 100 %a ta pplied current densities of À50 mA cm À2 and À100 mA cm À2 .T his work offers insight into the tunability of the pentlandite based electrocatalysts for the CO 2 reduction reaction.
“…Notably, the substitution of sulfur for selenium in the Fe/Ni‐pentlandite lattice results in insignificant changes to the ECSA, ranging from 0.0054 mF cm −2 ( Se‐5 ) to 0.0071 mF cm −2 ( Se‐3 ), across the investigated catalysts. This minimal effect of the S/Se exchange on the ECSA is also in good accordance to comparable CO 2 RR investigations employing sulfoselenides and suggests a similar electrode surface area . During electrolysis, the ECSA of the investigated electrode increases for all compounds.…”
The electrochemical reduction of CO 2 is an attractive strategy towards the mitigation of environmental pollution and production of bulk chemicals as well as fuels by renewables. The bimetallic sulfide Fe 4.5 Ni 4.5 S 8 (pentlandite) was recently reported as ac heap and robust catalyst for electrochemical water splitting, asw ell as for CO 2 reduction with a solvent-dependent product selectivity.I nspired by numerous reports on monometallic sulfoselenides and selenides revealing higher catalytic activity for the CO 2 reduction reaction (CO 2 RR) than their sulfide counterparts, the authors investigated the influence of stepwise S/Se exchange in seleno-pentlanditesF e 4.5 Ni 4.5 S 8-Y Se Y (Y = 1-5) and their ability to act as CO 2 reducingc atalysts. It is demonstrated that the incorporationo fh ighere quivalents of seleniumf avors the CO 2 RR with Fe 4.5 Ni 4.5 S 4 Se 4 revealingt he highest activity for CO formation. Under galvanostaticc onditions in acetonitrile, Fe 4.5 Ni 4.5 S 4 Se 4 generates CO with aF aradaic Efficiency close to 100 %a ta pplied current densities of À50 mA cm À2 and À100 mA cm À2 .T his work offers insight into the tunability of the pentlandite based electrocatalysts for the CO 2 reduction reaction.
“…Nevertheless, a critical concern regarding materials development in many research efforts is still the use of a laborious trial and error strategy, which makes systematic understanding of the behavior of the materials complex. Moreover, the catalytic properties of the active materials themselves are inherently different from those of the fabricated electrodes involving nanostructuring or additives . This difference can be misleading and often brings discrepancy between reported results.…”
Section: Introductionmentioning
confidence: 99%
“…The high electronic conductivity of transition metal chalcogenides (TMCs) compared to metal oxides renders them a highly efficient, inexpensive and robust alternative to metal oxides and competitive to noble metals in OER and ORR catalysis , . In addition, TMCs, especially pentlandites, have other important characteristics including chemical stability in acidic and alkaline media and thus corrosion‐resistance, robustness and variable electronic structure . These properties render TMCs promising catalytically active materials.…”
Section: Introductionmentioning
confidence: 99%
“…These properties render TMCs promising catalytically active materials. Initially, such metal chalcogenides have been recognized as inexpensive, efficient HER catalysts , , . Interestingly, a hand‐full of metal chalcogenides exhibited excellent activity towards OER.…”
The rational design of high-performance and costeffective electrocatalysts is a key for the development of sustainable energy systems such as electrolyzers, fuel cells and metal-air batteries. Although water splitting and fuel cells are commercially mature technologies, they are still limited on large scale primarily due to the abundancy of the currently utilized expensive materials as well as the sluggish kinetics of the underlaying reactions, oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), and thus the required large observed overpotentials. Therefore, an efficient inexpensive catalyst is necessary. In the last decade, metal chalcogenides have
“…15 This widespread interest can be attributed to the chemically robust nature of pentlandites, its pseudo-metallic conductivity as well as their large exibility of stoichiometric compositions. 16 Despite of the promising properties of pentlandite-type materials, their widespread and large-scale application is severely restricted by the currently employed synthetic strategies for their generation. Commonly, pentlandites are synthesized by high-temperature (ca.…”
In recent years, metal-rich sulfides of the pentlandite type (M9S8) have attracted considerable attention for energy storage applications. However, common synthetic routes towards pentlandites either involve energy intensive high temperature...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.