2017
DOI: 10.1039/c6sc05473k
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Nanophase-separated Ni3Nb as an automobile exhaust catalyst

Abstract: Nanophase-separated Ni3Nb alloy exhibited higher performance than traditional Pt catalysts toward the remediation of automobile exhaust.

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Cited by 19 publications
(20 citation statements)
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“…3b), highlighting the outstanding performance of the single-atom alloy catalyst. We also tested the long-term stability of Cu 5 Pd/Al 2 O 3 in NO reduction by CO under standard conditions (GHSV ¼ 40 000 h À1 ), where 100% C N 2 was maintained at 175 C. Although a number of bimetallic catalysts for NO reduction have been reported thus far, [12][13][14][15][16][42][43][44][45][46][47][48] to the best of our knowledge, the present work represents the rst success in complete NO x removal at a temperature less than 200 C. At 150 C, although C N 2 decreased slightly at the initial stage because of N 2 O formation, it recovered aer a short H 2 treatment. This result implies that the accumulation of oxygen species at the catalyst surface triggers the loss of N 2 selectivity and that the catalytic performance could be recovered under rich conditions.…”
Section: Resultsmentioning
confidence: 99%
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“…3b), highlighting the outstanding performance of the single-atom alloy catalyst. We also tested the long-term stability of Cu 5 Pd/Al 2 O 3 in NO reduction by CO under standard conditions (GHSV ¼ 40 000 h À1 ), where 100% C N 2 was maintained at 175 C. Although a number of bimetallic catalysts for NO reduction have been reported thus far, [12][13][14][15][16][42][43][44][45][46][47][48] to the best of our knowledge, the present work represents the rst success in complete NO x removal at a temperature less than 200 C. At 150 C, although C N 2 decreased slightly at the initial stage because of N 2 O formation, it recovered aer a short H 2 treatment. This result implies that the accumulation of oxygen species at the catalyst surface triggers the loss of N 2 selectivity and that the catalytic performance could be recovered under rich conditions.…”
Section: Resultsmentioning
confidence: 99%
“…5 Platinum-group metals (PGMs) such as Pt, Pd, and Rh are known to be efficient catalysts for the reduction of NO using CO, 6,7 H 2 , 8 NH 3 , 9 and hydrocarbons 10 as reductants. The recent challenges in this eld involve developing catalytic systems that function (1) at low temperatures under cold-start conditions, 11 (2) with minimum use of PGMs, 12,13 and (3) without emitting N 2 O, [14][15][16] which is a potent greenhouse gas. 17 These issues have been individually studied using different materials.…”
Section: Introductionmentioning
confidence: 99%
“…It is reported that some of binary alloys of late transition metals (Ni, Co, Rh, or Ru) and oxyphilic early transition metals (Nb, Ta, or Y) readily transformed into entangled, fibrous networks, when they were subjected to a mixed atmosphere containing reductive/oxidative gases. [ 20,21,25 ] Our Ni#MgO is generated from binary alloy of Mg 2 Ni. Mg also possess a highly oxyphilic nature.…”
Section: Resultsmentioning
confidence: 99%
“…The reaction-driven transformation of porous nanostructures into active nanostructures is not limited to metals, but can also be applied to intermetallic and alloy compounds. Recently, Ni 3 Nb has evolved into a nanophase-separated structure consisting of the filamentous Ni networks with thicknesses below 10 nm incorporated into a niobium oxide matrix, whose nanostructure is capable of sustaining the thermal agglomeration during long-term NO reduction conducted at elevated temperatures [ 83 ].…”
Section: Versatile Applicationsmentioning
confidence: 99%