## 1 Introduction  
Since the Industrial Revolution, fossil fuels have underpinned global energy infrastructure. Due to excessive reliance on these fossil fuels, atmospheric CO\({}_{2}\) concentrations have risen dramatically, making them a key driver of global warming [1, 2, 3, 4, 5]. Consequently, the fixation and conversion of CO\({}_{2}\) into high-value hydrocarbon fuels represent a promising strategy to address both energy sustainability and climate change. Recently, the electrocatalytic CO\({}_{2}\)RR has garnered significant interest owing to its environmentally benign process and efficient conversion into value-added products, including gaseous species (e.g., carbon monoxide, methane) and liquid fuels (e.g., formic acid, ethanol, methanol) [6, 7, 8, 9, 10]. However, the extremely low CO\({}_{2}\)-to-H\({}_{2}\)O molar ratio (\(\sim\)1:1300 at 1 atm) in aqueous electrolytes, coupled with the slow diffusion kinetics of CO\({}_{2}\), severely limits the reaction activity. To overcome these mass transport constraints, flow cell systems incorporating gas diffusion electrodes (GDEs) have been widely adopted, enabling high-rate CO\({}_{2}\) electrolysis [11; 12]. A typical GDE comprises three layers: a porous carbon fiber paper (CFP), a microporous layer (MPL), and a catalyst layer. This architecture facilitates gaseous CO\({}_{2}\) transport while restricting liquid permeation [13; 14; 15]. Nevertheless, weak interfacial contact between the MPL and catalyst often compromises electrical conductivity and long-term stability. Moreover, liquid flooding of the pores obstructs CO\({}_{2}\) access to active sites and prolongs diffusion pathways, ultimately deactivating the GDE during CO\({}_{2}\)RR. Thus, designing GDEs with high efficiency, selectivity, and durability remains a critical yet formidable challenge in electrocatalytic CO\({}_{2}\)RR. Metal-organic frameworks (MOFs) have demonstrated distinctive advantages in the electrochemical CO\({}_{2}\) reduction reaction (CO\({}_{2}\)RR) owing to their tunable pore structures and abundant metal active sites. The porous architecture of these materials enables efficient CO\({}_{2}\) adsorption and enrichment, while their metal nodes serve as active centers to facilitate the reaction process, thereby significantly enhancing the local CO\({}_{2}\) concentration around catalytic sites [16; 17; 18; 19]. For instance, the In-BDC MOF developed by [PERSON]'s team achieved a formate Faradaic efficiency of 88% at a potential of \(-\)0.669 V [20]. In another study, [PERSON]'s group employed a microwave-assisted method to rapidly construct bimetallic Bi-M MOFs (M = Zn/Sn/In), among which the BiZn-MOF exhibited a remarkable formate Faradaic efficiency of 92% at \(-\)0.9 V (vs. RHE) while maintaining a stable current density for 13 h of continuous electrolysis [21]. Nevertheless, current MOF-based catalysts still face critical challenges, including insufficient electron conductivity and competitive hydrogen evolution reaction (HER), resulting in ineffective activation of adsorbed CO\({}_{2}\) and consequently limiting the overall catalytic performance [22; 23; 24; 25]. This study proposes a novel strategy for fabricating GDEs with tailored properties by integrating two or more distinct MOFs into a sophisticated MOF hybrid material. Specifically, Ni-MOF (CCDC-638866, from the Cambridge Crystallographic Data Centre) [26] was selected as the catalytic substrate due to its high-density nickel active sites, exceptional electron conductivity, and moderate redox potential [27; 28; 29; 30; 31], which collectively ensure efficient electron transfer while selectively promoting CO\({}_{2}\) reduction over the competing HER. Concurrently, ZIF materials demonstrate outstanding performance in suppressing HER owing to their inherent chemical stability, tunable hydrophobicity, and superior CO\({}_{2}\) adsorption capacity [12; 32; 33; 34; 35; 36; 37].