Abstract:The
development of an efficient catalyst for the oxygen evolution
reaction (OER) is critical to fulfilling the mission of hydrogen generation
by water splitting. Various multicomponent systems have been investigated
so far for the OER, although a systematic investigation is lacking
and there are discrepancies as to which formulations make the best
catalyst. Here, we perform a systematic investigation of a ternary
Ni-Fe-Co oxide gradient library for the OER, using a combinatorial
approach. This approach allows … Show more
“…10,[60][61][62] In our previous work, we have shown that the addition of modest amounts of cobalt to the NiFe system can have a significant impact on the OER activity. 29 Various such transition elements (Cr, Ce, V, Mn) owing to their tuneable d-band structure, have been incorporated into the standard NiFe system to improve its catalytic properties. [63][64][65][66][67] In the study of multimetal alloys, obtaining the same volume of data as we obtained and effectively spanning the same compositional space as achieved in our work would require a substantially higher number of experiments, time, and cost.…”
Section: Discussionmentioning
confidence: 99%
“…In our previous work, we demonstrated the incorporation of Fe and Co into a Ni matrix as an effective strategy to improve the catalytic performance. 29 Although cobalt improves the OER performance, cobalt is a critical raw material and its mining raises environmental, social, and governance issues. Herein, we chose vanadium as a suitable candidate to drive down the overpotential of the NiFe based catalysts relying on vanadium's multivalency, relative abundance, 30 and stability.…”
We performed a high throughput investigation of a Ni, Fe and V library for the oxygen evolution reaction. The study provides insights into the composition-activity relationship and guides rapid design and development of high performing catalysts.
“…10,[60][61][62] In our previous work, we have shown that the addition of modest amounts of cobalt to the NiFe system can have a significant impact on the OER activity. 29 Various such transition elements (Cr, Ce, V, Mn) owing to their tuneable d-band structure, have been incorporated into the standard NiFe system to improve its catalytic properties. [63][64][65][66][67] In the study of multimetal alloys, obtaining the same volume of data as we obtained and effectively spanning the same compositional space as achieved in our work would require a substantially higher number of experiments, time, and cost.…”
Section: Discussionmentioning
confidence: 99%
“…In our previous work, we demonstrated the incorporation of Fe and Co into a Ni matrix as an effective strategy to improve the catalytic performance. 29 Although cobalt improves the OER performance, cobalt is a critical raw material and its mining raises environmental, social, and governance issues. Herein, we chose vanadium as a suitable candidate to drive down the overpotential of the NiFe based catalysts relying on vanadium's multivalency, relative abundance, 30 and stability.…”
We performed a high throughput investigation of a Ni, Fe and V library for the oxygen evolution reaction. The study provides insights into the composition-activity relationship and guides rapid design and development of high performing catalysts.
“…Nanoscale porosity in mixed metal phosphonates, such as Ni-W mixed metal phosphonate, has been found to be responsible for efficient photoelectrochemical OER in alkaline conditions, showcasing the versatility of these materials in harnessing solar energy for water splitting [97]. Furthermore, the combinatorial synthesis and screening of ternary NiFeCoO x libraries have provided insights into the optimization of mixed metal oxide combinations for the oxygen evolution reaction [98].…”
Section: Further Inorganic Materials For Water Splittingmentioning
The global demand for sustainable energy sources has led to extensive research regarding (green) hydrogen production technologies, with water splitting emerging as a promising avenue. In the near future the calculated hydrogen demand is expected to be 2.3 Gt per year. For green hydrogen production, 1.5 ppm of Earth’s freshwater, or 30 ppb of saltwater, is required each year, which is less than that currently consumed by fossil fuel-based energy. Functional ceramics, known for their stability and tunable properties, have garnered attention in the field of water splitting. This review provides an in-depth analysis of recent advancements in functional ceramics for water splitting, addressing key mechanisms, challenges, and prospects. Theoretical aspects, including electronic structure and crystallography, are explored to understand the catalytic behavior of these materials. Hematite photoanodes, vital for solar-driven water splitting, are discussed alongside strategies to enhance their performance, such as heterojunction structures and cocatalyst integration. Compositionally complex perovskite oxides and high-entropy alloys/ceramics are investigated for their potential for use in solar thermochemical water splitting, highlighting innovative approaches and challenges. Further exploration encompasses inorganic materials like metal oxides, molybdates, and rare earth compounds, revealing their catalytic activity and potential for water-splitting applications. Despite progress, challenges persist, indicating the need for continued research in the fields of material design and synthesis to advance sustainable hydrogen production.
“…8 Furthermore, it can be easily implemented as combinatorial deposition method for (1) thickness gradients by adjusting the covered area of multiple spray cycles [9][10][11][12][13][14][15] and (2) composition gradients a Energy Conversion and Hydrogen, Center for Energy, AIT Austrian Institute of by capitalizing the lateral spread of the spray cone and overlapping different precursor solutions consecutively 16 or simultanously. [17][18][19] Directly mixing multiple solutions during a laterally resolved coating process has already been reported. 20 In this contribution we synthesize combinatorial films with two-dimensional composition gradients of metal oxides.…”
Section: Introductionmentioning
confidence: 99%
“…8 Furthermore, it can be easily implemented as combinatorial deposition method for (1) thickness gradients by adjusting the covered area of multiple spray cycles 9–15 and (2) composition gradients by capitalizing the lateral spread of the spray cone and overlapping different precursor solutions consecutively 16 or simultanously. 17–19 Directly mixing multiple solutions during a laterally resolved coating process has already been reported. 20…”
The discovery of new materials with a well-defined set of properties is a work-intensive and time-consuming task, when relying on conventional experimental routines. The employment of high-throughput (HT) techniques speeds...
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