Robust Fe2+-doped nickel-iron layered double hydroxide electrode for electrocatalytic reduction of hexavalent chromium by pulsed potential method

doi:10.1016/j.jmst.2021.08.086

Abstract

Abstract:

Electrocatalytic reduction of Cr(VI) to less toxic Cr(III) is deemed as a promising technique. Conventional electrocatalytic reduction is always driven by a constant cathodic potential, which exhibits a repelling action to Cr(VI) oxyanions in wastewater and consequently suppresses reduction kinetics. In order to remarkably accelerate Cr(VI) electrocatalytic reduction, we applied a pulsed potential on an Fe²⁺-NiFe LDH/NF electrode synthesized by in situ growth of Fe²⁺-doped NiFe LDH nanosheets on Ni foam using a spontaneous redox reaction. Under anodic potential section, HCrO₄^- anions are adsorbed on the electrode surface and reduced to Cr(III) by Fe²⁺. Then, Cr(III) ions are desorbed from the electrode surface under coulombic force. The regeneration of Fe²⁺ and direct reduction of Cr(VI) are achieved under cathodic potential section. The pulsed potential can achieve complete elimination of Cr(VI) within 60 min at an initial concentration of 10 mg L^-1, and the removal efficiency shows a 60% increase with respect to that under constant cathodic potential.

Key words: Hexavalent chromium, Electrocatalytic reduction, Pulsed potential, NiFe LDH, Fe cycle

Zhifei Wang, Jinbo Xue, Yong Li, Qianqian Shen, Qi Li, Xiaochao Zhang, Xuguang Liu, Husheng Jia. Robust Fe²⁺-doped nickel-iron layered double hydroxide electrode for electrocatalytic reduction of hexavalent chromium by pulsed potential method[J]. J. Mater. Sci. Technol., 2022, 110: 73-83.

Figures/Tables 10

Fig. 1. Schematic illustration of the facile synthesis of Fe2+-NiFe LDH/NF.

Fig. 2. Typical crystal structure of Fe2+-NiFe LDH/NF.

Fig. 3. XRD patterns of Fe2+-NiFe LDH/NF before and after electrocatalytic reduction of Cr(VI).

Fig. 4. (a, b) High-magnification, (inset a1 and b1) low-magnification SEM images and (inset a2 and b2) the optical images of bare Ni foam and Fe2+-NiFe LDH/NF; (c) Low-magnification TEM image of Fe2+-NiFe LDH and corresponding SAED pattern (inset); (d) High-resolution TEM image (HRTEM) of Fe2+-NiFe LDH; and (e) EDS mapping images of Fe2+-NiFe LDH (For interpretation of the references to color in this figure, the reader is referred to the web version of this article).

Fig. 5. XPS spectra of Fe2+-NiFe LDH/NF before and after electrocatalytic Cr(VI) reduction. (a) Survey spectra; (b) Cr 2p; (c) Fe 2p; and (d) Ni 2p.

Fig. 6. Parameters optimizatioon in electrocatalytic removal of Cr(VI) with Fe2+-NiFe LDH/NF: (a) Ea (at fixed Ec = -0.8 V vs. SCE); (b) Ec (at fixed Ea = -0.1 V vs. SCE); (c) pulsed time; (d) electrolyte concentration; (e) removal performance with pulsed potential, constant Ea = -0.1 V, Ec = -0.6 V vs. SCE and adsorption; (f) removal efficiency with respect to charge consumption under constant and pulsed potential.

Fig. 7. (a) Performance of Cr(VI) removal using different electrodes; effect of (b) pH, (c) initial concentration, and (d) coexisting ions on Cr(VI) removal (Condition: Ea = -0.1 V and Ec = -0.6 V).

Fig. 8. Removal performance of total Cr and Cr(VI) under (a) constant Ea = -0.1 V vs. SCE and (b) pulsed potential; (c) CV curve of Fe2+-NiFe LDH/NF in NaCl solution without Cr(VI); and (d) CV curves of bare Ni foam in NaCl solution with presence and absence of Cr(VI).

Fig. 9. Schematic of Cr(VI) reduction process under pulsed potential.

Fig. 10. Recyclability of Fe2+-NiFe LDH/NF for Cr(VI) removal.

References 42

[1]	H.Y. Dong, G.F. Wei, T.C. Cao, B.B. Shao, X.H. Guan, T.J. Strathmann, Environ. Sci. Technol. 54 (2020) 1157-1166. DOI URL
[2]	P. Liao, C. Pan, W.Y. Ding, W.L. Li, S.H. Yuan, J.D. Fortner, D.E. Giammar, Environ. Sci. Technol. 54 (2020) 4256-4266. DOI URL
[3]	Q.Q. Shen, J.B. Xue, Y. Li, G.X. Gao, Q. Li, X.G. Liu, H.S. Jia, B.S. Xu, Y.C. Wu, S.J. Dillonc, Appl. Catal. B Environ. 282 (2021) 119552.
[4]	B. Jiang, Q.H. Niu, C. Li, N. Oturan, M.A. Oturan, Appl. Catal. B Environ. 272 (2020) 119002.
[5]	X.R. Chen, Y. Zhang, D.S. Yuan, W. Huang, J. Ding, H. Wan, W.L. Dai, J. Mater. Sci. Technol. 71 (2021) 211-220. DOI URL
[6]	M. Yu, J. Shang, J. Mater. Sci. Technol. 91 (2021) 17-27. DOI URL
[7]	X. Mo, Z.H. Yang, H.Y. Xu, G.M. Zeng, J. Huang, X. Yang, P.P. Song, L.K. Wang, J. Hazard. Mater. 286 (2015) 493-502. DOI URL
[8]	X.L. Hou, Z. Wang, C.Q. Fang, Y.L. Cheng, J. Mater. Sci. Technol. 35 (2019) 323-329. DOI URL
[9]	J. Ali, L. Wang, H. Waseem, R. Djellabi, N.A. Oladoja, G. Pan, Chem. Eng. J. 384 (2020) 123335.
[10]	T.J. Jiang, M. Yang, S.S. Li, M.J. Ma, N.J. Zhao, Z. Guo, J.H. Liu, X.J. Huang, Anal. Chem. 89 (2017) 5557-5564. DOI URL
[11]	Z.D. Wang, Y.T. Feng, X.G. Hao, W. Huang, X.S. Feng, J. Mater. Chem. A 2 (2014) 10263-10272.
[12]	L.K. Xu, E.I. Izgorodina, M.L. Coote, J. Am. Chem. Soc. 142 (2020) 12826-12833.
[13]	Y.P. Long, J.T. Nie, C.C. Yuan, H. Ma, Y.Q. Chen, Y.Q. Cong, Q. Wang, Y. Zhang, Appl. Catal. B Environ. 283 (2021) 119604.
[14]	J.A. Yáñez-Varela, A. Alonzo-Garcia, I. González-Neria, V. Mendoza-Escamilla, G. Rivadeneyra-Romero, S.A. Martínez-Delgadillo, Chem. Eng. J. 390 (2020) 124575.
[15]	F.B. Yao, M.C. Jia, Q. Yang, K. Luo, F. Chen, Y. Zhong, L. He, Z.J. Pi, K.J. Hou, D.B. Wang, X.M. Li, Chemosphere 260 (2020) 127537.
[16]	Y. Luo, Y.H. Wu, C. Huang, D.Z. Xiao, L.Z. Zhang, S.H. Ma, J.K. Qu, S.L. Zheng, P.K. Chu, Chem. Eng. J. 396 (2020) 125156.
[17]	J. Wu, H. Zheng, F. Zhang, R.J. Zeng, B.S. Xing, Chem. Eng. J. 362 (2019) 21-29. DOI URL
[18]	M. Gheju, I. Balcu, J. Hazard. Mater. 196 (2011) 131-138. DOI PMID
[19]	Q. Wang, D. O’Hare, Chem. Rev. 112 (2012) 4124-4155. DOI URL
[20]	S.T. Lin, H.N. Tran, H.P. Chao, J.F. Lee, Appl. Clay Sci. 162 (2018) 443-453. DOI URL
[21]	H.N. Trana, D.T. Nguyen, G.T. Le, F. Tomuld, E.C Lima, S.H. Woo, A.K. Sarmah, H.Q. Nguyen, P.T. Nguyen, D.D. Nguyen, T.V. Nguyen, S. Vigneswaran. D.V.N. Vo, H.P. Chao, J. Hazard. Mater. 373 (2019) 258-270. DOI PMID
[22]	F. Li, Y.F. Wang, Q.Z. Yang, D.G. Evans, C. Forano, X. Duan, J. Hazard. Mater. 125 (2005) 89-95. DOI URL
[23]	F.L. Ling, L. Fang, Y. Lu, J.M. Gao, F. Wu, M. Zhou, B.S. Hu, Microporous Meso- porous Mater. 234 (2016) 230-238.
[24]	W.X. Zhu, T.S. Zhang, Y. Zhang, Z.H. Yue, Y.G. Li, R. Wang, Y.W. Ji, X.P. Sun, J.L. Wang, Appl. Catal. B Environ. 244 (2019) 844-852. DOI URL
[25]	Z. Cai, D.J. Zhou, M.Y. Wang, S.M. Bak, Y.S. Wu, Z.S. Wu, Y. Tian, X.Y. Xiong, Y.P. Li, W. Liu, S. Siahrostami, Y. Kuang, X.Q. Yang, H.H. Duan, Z.X. Feng, H.L. Wang, X.M. Sun, Angew. Chem. Int. Ed. 57 (2018) 9392-9396. DOI URL
[26]	D.G. Evans, R. C.T. Slade, X. Duan, D.G. Evans, Springer, Heidelberg, Berlin, 2006, pp. 1-87. Structure and Bonding.
[27]	F. Xu, R.D. Webster, J.F. Chen, T. T.Y. Tan, P. H.L. Sit, W.Y. Teoh, Appl. Catal. B Environ. 210 (2017) 444-453. DOI URL
[28]	J. Zhu, G.F. Zhao, W.D. Sun, Q. Nie, S. Wang, Q.S. Xue, Y. Liu, Y. Lu, Appl. Catal. B Environ. 270 (2020) 118873.
[29]	Y. Dong, S. Komarneni, N. Wang, W.C. Hu, W.Y. Huang, J. Mater. Chem. A 7 (2019) 6995-7005. DOI
[30]	F. Cavani, F. Trifiro, A. Vaccari, Catal. Today 11 (1991) 173-307. DOI URL
[31]	Z.F. Wang, Q.Q. Shen, J.B. Xue, H.S. Jia, B.S. Xu, X.G. Liu, Q. Li, Mater. Chem. Phys. 240 (2020) 122140.
[32]	H.S. Yin, Q. Guo, C. Lei, W.Q. Chen, B.B. Huang, Chem. Eng. J. 396 (2020) 125156.
[33]	J.F. Xie, H.C. Qu, F.C. Lei, X. Peng, W.W. Liu, L. Gao, P. Hao, G.W. Cui, B. Tang, J. Mater. Chem. A 6 (2018) 16121-16129. DOI URL
[34]	Z.F. Wang, Q.Q. Shen, J.B. Xue, R.F. Guan, Q. Li, X.G. Liu, H.S. Jia, Y.C. Wu, Chem. Eng. J. 402 (2020) 126151.
[35]	J.Q. Gao, Q.Q. Shen, R.F. Guan, J.B. Xue, X.G. Liu, H.S. Jia, Q. Li, Y.C. Wu, J. CO 2 Util. 35 (2020) 205-215.
[36]	Z.L. Zhao, H.X. Wu, H.L. He, X.L. Xu, Y.D. Jin, J. Mater. Chem. A 3 (2015) 7179-7186. DOI URL
[37]	H.T. Wang, C.Z. Na, ACS Appl. Mater. Interfaces 6 (2014) 20309-20316.
[38]	M. Li, S.Q. Zhou, Chem. Eng. J. 339 (2018) 539-546. DOI URL
[39]	L.P. Huang, X.L. Chai, G.H. Chen, B.E. Logan, Environ. Sci. Technol. 45 (2011) 5025-5031. DOI URL
[40]	Y. Li, J.B. Xue, Q.Q. Shen, S.F. Jia, Q. Li, Y.X. Li, X.G. Liu, H.S. Jia, Chem. Eng. J. 423 (2021) 130188.
[41]	J.X. Han, X.Y. Meng, L. Lu, Z.L. Wang, C.W. Sun, Nano Energy 72 (2020) 104669.
[42]	J.T. Liu, Y. Ding, L.F. Ji, X. Zhang, F.C. Yang, J.D. Wang, W.D. Kang, Anal. Methods 9 (2017) 1031-1037. DOI URL

Robust Fe²⁺-doped nickel-iron layered double hydroxide electrode for electrocatalytic reduction of hexavalent chromium by pulsed potential method

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 10

References 42

Related Articles 1

Recommended Articles

Metrics

Comments