Sn Quantum Dots for Electrocatalytic Reduction of CO2 to HCOOH

doi:10.15541/jim20210177

Journal of Inorganic Materials ›› 2021, Vol. 36 ›› Issue (12): 1337-1342.DOI: 10.15541/jim20210177

Special Issue: 【虚拟专辑】碳中和(2020~2021)；【能源环境】量子点；【能源环境】CO2绿色转换

• RESEARCH LETTER • Previous Articles Next Articles

Sn Quantum Dots for Electrocatalytic Reduction of CO₂ to HCOOH

TIAN Jianjian¹^,²(), MA Xia¹^,², WANG Min¹, YAO Heliang¹, HUA Zile¹, ZHANG Lingxia¹^,²^,³()

1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3. School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China

Received:2021-03-19 Revised:2021-05-07 Published:2021-12-20 Online:2021-05-25
Contact: ZHANG Lingxia, professor. E-mail: zhlingxia@mail.sic.ac.cn
About author:TIAN Jianjian (1989-), female, PhD. E-mail: tianshujian11@163.com
Supported by:
National Key R&D Program of China(2017YFE0127400);National Natural Science Foundation of China(51872317);National Natural Science Foundation of China(21835007);Science and Technology Commission of Shanghai(20520711900)

Abstract

Abstract:

Sn based materials, as low-cost and earth-abundant electrocatalysts, are potential candidates for CO₂ reduction reaction (CO₂RR) into liquid fuels. Unfortunately, the low selectivity and stability limits their applications. Herein, we developed an electrocatalyst of Sn quantum dots (Sn-QDs) for efficient, durable and highly selective CO₂ reduction to HCOOH. The Sn-QDs were conﬁrmed with high crystallinity and an average size of only 2-3 nm. Small particle size endowed the electrocatalyst with improved electrochemical active surface area (ECSA), which was about 4.4 times of that of Sn particle. This enlarged ECSA as well as accelerated CO₂RR kinetics favored the electrochemical conversion of CO₂. The Faradaic efﬁciency of HCOOH (FE_HCOOH) on Sn-QDs/CN reached up to 95% at -1.0 V (vs RHE), which exceeded 83% in the recorded wide potential window of 0.5 V. Moreover, the Sn-QDs electrocatalyst exhibited good electrochemical durability for 24 h.

Key words: CO₂reduction, Sn quantum dots, HCOOH, electrocatalyst

CLC Number:

TQ174

TIAN Jianjian, MA Xia, WANG Min, YAO Heliang, HUA Zile, ZHANG Lingxia. Sn Quantum Dots for Electrocatalytic Reduction of CO₂ to HCOOH[J]. Journal of Inorganic Materials, 2021, 36(12): 1337-1342.

Figures/Tables 13

References 28

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Electrocatalyst	Electrolyte	Potential /V (vs. RHE)	FE_HCOOH /%	Current density /(mA·cm^-2)	Stability/h	Ref.
Sn-QDs/CN	0.1 mol·L^-1 KHCO₃	-1.0	95	3.3	24	This work
Sn quantum sheets confined in graphene	0.1 mol·L^-1 NaHCO₃	-1.2	89	21.1	50	[1]
Nano-SnO₂/graphene	0.1 mol·L^-1 NaHCO₃	-1.2	93.6	10	-	[2]
SnO₂ nanoparticles (< 5 nm)	0.1 mol·L^-1 KHCO₃	-1.2	64	147	-	[3]
SnO₂ nanoparticles (~500 nm)	0.1 mol·L^-1 KHCO₃	-1.2	83.5	7.56	-	[4]
SnO₂ nanoparticles (100 nm)	0.5 mol·L^-1 KHCO₃	-0.9	80	12	-	[5]
SnO₂ nanoparticles (8-20 nm)	0.1 mol·L^-1 KHCO₃	-1.06	82	15.3	5	[6]
SnO₂@N-CNW	0.5 mol·L^-1 NaHCO₃	-0.8	90	13	20	[7]
SnO₂@N-rGO	0.5 mol·L^-1 NaHCO₃	-0.8	89	21.3	20	[8]
SnO₂/PC	0.5 mol·L^-1 KHCO₃	-0.86	92	29	10	[9]
SnO₂⊃NC@EEG	0.1 mol·L^-1 KHCO₃	-1.2	81.2	13.4	10	[10]
SnO/C	0.5 mol·L^-1 KHCO₃	-0.86	75	27.2	-	[11]

Electrocatalyst	Electrolyte	Potential /V (vs. RHE)	FE_HCOOH /%	Current density /(mA·cm^-2)	Stability/h	Ref.
Sn-QDs/CN	0.1 mol·L^-1 KHCO₃	-1.0	95	3.3	24	This work
Sn quantum sheets confined in graphene	0.1 mol·L^-1 NaHCO₃	-1.2	89	21.1	50	[1]
Nano-SnO₂/graphene	0.1 mol·L^-1 NaHCO₃	-1.2	93.6	10	-	[2]
SnO₂ nanoparticles (< 5 nm)	0.1 mol·L^-1 KHCO₃	-1.2	64	147	-	[3]
SnO₂ nanoparticles (~500 nm)	0.1 mol·L^-1 KHCO₃	-1.2	83.5	7.56	-	[4]
SnO₂ nanoparticles (100 nm)	0.5 mol·L^-1 KHCO₃	-0.9	80	12	-	[5]
SnO₂ nanoparticles (8-20 nm)	0.1 mol·L^-1 KHCO₃	-1.06	82	15.3	5	[6]
SnO₂@N-CNW	0.5 mol·L^-1 NaHCO₃	-0.8	90	13	20	[7]
SnO₂@N-rGO	0.5 mol·L^-1 NaHCO₃	-0.8	89	21.3	20	[8]
SnO₂/PC	0.5 mol·L^-1 KHCO₃	-0.86	92	29	10	[9]
SnO₂⊃NC@EEG	0.1 mol·L^-1 KHCO₃	-1.2	81.2	13.4	10	[10]
SnO/C	0.5 mol·L^-1 KHCO₃	-0.86	75	27.2	-	[11]

Parameter	R_s/Ω	R_ct/Ω	CPE-T	CPE-P
Sn-QDs/CN	102.6	276.3	1.2×10^-5	0.85
Sn-p/CN	96.74	336.9	1.1×10^-5	0.89

Parameter	R_s/Ω	R_ct/Ω	CPE-T	CPE-P
Sn-QDs/CN	102.6	276.3	1.2×10^-5	0.85
Sn-p/CN	96.74	336.9	1.1×10^-5	0.89

Sn Quantum Dots for Electrocatalytic Reduction of CO₂ to HCOOH

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