Research output: Contribution to journal › Article › peer-review
Catalytic synthesis of segmented carbon filaments via decomposition of chlorinated hydrocarbons on Ni-Pt alloys. / Bauman, Yury I.; Mishakov, Ilya V.; Rudneva, Yuliya V. et al.
In: Catalysis Today, Vol. 348, 15.05.2020, p. 102-110.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Catalytic synthesis of segmented carbon filaments via decomposition of chlorinated hydrocarbons on Ni-Pt alloys
AU - Bauman, Yury I.
AU - Mishakov, Ilya V.
AU - Rudneva, Yuliya V.
AU - Popov, Anton A.
AU - Rieder, D.
AU - Korneev, Denis V.
AU - Serkova, Alexandra N.
AU - Shubin, Yury V.
AU - Vedyagin, Aleksey A.
PY - 2020/5/15
Y1 - 2020/5/15
N2 - A series of micro-disperse Ni1-xPtx alloys with the sponge-like structure was prepared by a simultaneous precipitation method with subsequent sintering of the sediment in H2 atmosphere at 800 °C. The formation of single-phase solid solution Ni1-xPtx was confirmed by powder XRD analysis for entire range of Pt concentrations (1.3–75.9 wt.%). The synthesized samples were studied in a process of catalytic decomposition of C2H4Cl2 at 600 °C. In situ kinetic studies of the carbon deposition process were carried out in a flow gravimetric setup equipped with McBain balances. Interaction of Ni-Pt alloys with reaction mixture is characterized by an induction period (18–32 min) followed by rapid disintegration of the bulk alloys with intensive growth of carbon fibers. The stage of the induction period was explored in detail by means of XRD and SEM techniques. According to XRD data, the interaction of Ni-Pt alloys with C2H4Cl2 vapors is accompanied by formation of Ni1-xPtxCδ interstitial solution due to entry of carbon into the crystal lattice of the alloy. The effect of Pt addition on catalytic activity of Ni in CCVD process was also studied. It was found that the yield of carbon product depends extremely on Pt concentration with a maximum at CPt =4.3 wt.% (26 g/gNi for 120 min). The impact of Pt concentration upon morphology and structural features of the produced carbon fibers was investigated by SEM and TEM techniques.
AB - A series of micro-disperse Ni1-xPtx alloys with the sponge-like structure was prepared by a simultaneous precipitation method with subsequent sintering of the sediment in H2 atmosphere at 800 °C. The formation of single-phase solid solution Ni1-xPtx was confirmed by powder XRD analysis for entire range of Pt concentrations (1.3–75.9 wt.%). The synthesized samples were studied in a process of catalytic decomposition of C2H4Cl2 at 600 °C. In situ kinetic studies of the carbon deposition process were carried out in a flow gravimetric setup equipped with McBain balances. Interaction of Ni-Pt alloys with reaction mixture is characterized by an induction period (18–32 min) followed by rapid disintegration of the bulk alloys with intensive growth of carbon fibers. The stage of the induction period was explored in detail by means of XRD and SEM techniques. According to XRD data, the interaction of Ni-Pt alloys with C2H4Cl2 vapors is accompanied by formation of Ni1-xPtxCδ interstitial solution due to entry of carbon into the crystal lattice of the alloy. The effect of Pt addition on catalytic activity of Ni in CCVD process was also studied. It was found that the yield of carbon product depends extremely on Pt concentration with a maximum at CPt =4.3 wt.% (26 g/gNi for 120 min). The impact of Pt concentration upon morphology and structural features of the produced carbon fibers was investigated by SEM and TEM techniques.
KW - 1,2-Dichloroethane decomposition
KW - Carbon erosion
KW - Carbon segmented nanofilaments
KW - Nickel–platinum alloys
KW - Self-organizing catalysts
UR - http://www.scopus.com/inward/record.url?scp=85070859849&partnerID=8YFLogxK
U2 - 10.1016/j.cattod.2019.08.015
DO - 10.1016/j.cattod.2019.08.015
M3 - Article
AN - SCOPUS:85070859849
VL - 348
SP - 102
EP - 110
JO - Catalysis Today
JF - Catalysis Today
SN - 0920-5861
ER -
ID: 21345538